Moshnyaga, Vasily T.

[["dc.bibliographiccitation.artnumber","489"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Crystals"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.contributor.author","Samwer, Konrad"],["dc.date.accessioned","2019-09-24T09:47:53Z"],["dc.date.available","2019-09-24T09:47:53Z"],["dc.date.issued","2019"],["dc.description.abstract","Transition metal functional oxides, e.g., perovskite manganites, with strong electron, spin and lattice correlations, are well-known for different phase transitions and field-induced colossal effects at the phase transition. Recently, the interfaces between dissimilar perovskites were shown to be a promising concept for the search of emerging phases with novel functionalities. We demonstrate that the properties of manganite films are effectively controlled by low dimensional emerging phases at intrinsic and extrinsic interfaces and appeared as a result of symmetry breaking. The examples include correlated Jahn–Teller polarons in the phase-separated (La1−yPry)0.7Ca0.3MnO3, electron-rich Jahn–Teller-distorted surface or “dead” layer in La0.7Sr0.3MnO3, electric-field-induced healing of “dead” layer as an origin of resistance switching effect, and high-TC ferromagnetic emerging phase at the SrMnO3/LaMnO3 interface in superlattices. These 2D polaronic phases with short-range electron, spin, and lattice reconstructions could be extremely sensitive to external fields, thus, providing a rational explanation of colossal effects in perovskite manganites."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2019"],["dc.identifier.doi","10.3390/cryst9100489"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16406"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62462"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/246102/EU//IFOX"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B01 Photon-induced structural phase transition controlled by electronic correlations"],["dc.relation","SFB 1073 | Topical Area B | B04 External field control of photon energy conversion in manganites"],["dc.relation.eissn","2073-4352"],["dc.relation.issn","2073-4352"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Polaronic Emergent Phases in Manganite-based Heterostructures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2002049"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Advanced Materials Interfaces"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Hoffmann-Urlaub, Sarah"],["dc.contributor.author","Ross, Ulrich"],["dc.contributor.author","Hoffmann, Jörg"],["dc.contributor.author","Belenchuk, Alexandr"],["dc.contributor.author","Shapoval, Oleg"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Ma, Qian"],["dc.contributor.author","Kressdorf, Birte"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2021-04-14T08:29:32Z"],["dc.date.available","2021-04-14T08:29:32Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Interest in layered Ruddlesden–Popper (RP) strongly correlated manganites of Pr0.5Ca1.5MnO4 as well as in their thin film polymorphs is motivated by the high temperature of charge orbital ordering above room temperature. The c‐axis orientation in epitaxial films is tailored by different SrTiO3 (STO) substrate orientations and CaMnO3 (CMO) buffer layers. Films on STO(110) show in‐plane alignment of the c‐axis parallel to the [100] direction. On STO(100), two possible directions of the in‐plane c‐axis lead to a mosaic like, quasi 2D nanostructure, consisting of RP, rock‐salt, and perovskite blocks. With the CMO buffer layer, Pr0.5Ca1.5MnO4 epitaxial films with c‐axis out‐of‐plane are realized. Different physical vapor deposition techniques as ion beam sputtering, pulsed laser deposition and metalorganic aerosol deposition are applied in order to distinguish effects of growth conditions from intrinsic epitaxial properties. Despite their very different growth conditions, surface morphology, crystal structure, and orientation of the thin films reveal a high level of similarity as verified by X‐ray diffraction, scanning, and high resolution transmission electron microscopy. For different epitaxial relations stress in the films is relaxed by means of modified interface chemistry. The charge ordering in the films occurs at a temperature close to that expected in bulk material."],["dc.description.abstract","The growth direction of a Ruddlesden–Popper Pr0.5Ca1.5MnO4 thin film is governed by its strain state. For different SrTiO3 substrate orientations the unit cells of the film are aligned in parallel or in a perpendicular configuration—forming a mosaic like microstructure. With a CaMnO3 buffer layer the c‐axis can even be tilted to the out‐of‐plane direction. image"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.identifier.doi","10.1002/admi.202002049"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/82926"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B02 Photonen-getriebener Energietransfer über Grenzflächen zwischen Materialien mit starken Korrelationen"],["dc.relation","SFB 1073 | Topical Area Z | Z02 Hochauflösende Charakterisierung von Grenzflächen"],["dc.relation.eissn","2196-7350"],["dc.relation.issn","2196-7350"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made."],["dc.title","Tailoring c-axis orientation in epitaxial Ruddlesden-Popper Pr0.5Ca1.5MnO4 films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","063034"],["dc.bibliographiccitation.journal","New Journal of Physics"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Krisponeit, J-O"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T09:38:54Z"],["dc.date.available","2018-11-07T09:38:54Z"],["dc.date.issued","2014"],["dc.description.abstract","We report a colossal magnetorefractive effect (MRE) in epitaxial thin films of a classical colossal magnetoresistance (CMR) manganite, (La-1 (-) Pr-y(y))(2/3)Ca1/3MnO3 (y = 0.375 and 0.7). Close to the ferromagnetic (FM) phase transition a moderate applied magnetic field, H similar to 10 kOe, results in a reduction of the optical reflectance by similar to 18% for the photon energy E similar to 2.7 eV. The MRE spectral behavior with three pronounced maxima at E = 1.6, 2.7 and 4.0eV points out an inter-site nature of the involved optical transitions. The results are discussed within a phase separation scenario with coexisting FM metallic nanodomains antiferromagnetically coupled by correlated polarons. The probability of MRE optical transitions is maximal for antiparallel alignment of Mn3+/Mn4+-spins realized for the coercive field, H-c similar to 200-800 Oe, and is suppressed by stronger fields, which favor FM metallic behavior. As a result, both the optical reflectivity and the electrical resistance decrease, yielding a close similarity between the CMR and MRE behavior."],["dc.description.sponsorship","Open Access Publikationsfonds 2014"],["dc.identifier.doi","10.1088/1367-2630/16/6/063034"],["dc.identifier.fs","608256"],["dc.identifier.isi","000339079600004"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10565"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33160"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/246102/EU//IFOX"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B04 External field control of photon energy conversion in manganites"],["dc.relation.issn","1367-2630"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 3.0"],["dc.title","Visible range colossal magnetorefractive effect in (La-1 (-) Pr-y(y))(2/3)Ca1/3MnO3 films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Physical Review Applied"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Kressdorf, B."],["dc.contributor.author","Meyer, T."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","ten Brink, M."],["dc.contributor.author","Melles, S."],["dc.contributor.author","Ross, U."],["dc.contributor.author","Hoffmann, J."],["dc.contributor.author","Moshnyaga, Vasily"],["dc.contributor.author","Seibt, Michael"],["dc.contributor.author","Blöchl, Peter"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2021-04-14T08:31:35Z"],["dc.date.available","2021-04-14T08:31:35Z"],["dc.date.issued","2020"],["dc.description.abstract","Harvesting of solar energy by hot carriers from optically induced intraband transitions offers new perspectives for photovoltaic energy conversion. Clearly, mechanisms slowing down hot-carrier thermalization constitute a fundamental core of such pathways of third-generation photovoltaics. The intriguing concept of hot polarons stabilized by long-range phonon correlations in charge-ordered strongly correlated three-dimensional metal-oxide perovskite films has emerged and been demonstrated for Pr0.7Ca0.3MnO3 at low temperature. In this work, a tailored approach to extending such processes to room temperature is presented. It consists of a specially designed epitaxial growth of two-dimensional Ruddlesden-Popper Pr0.5Ca1.5MnO4 films on Nb:SrTiO3 with a charge-ordering transition at TCO ∼ 320 K. This opens the route to a different phonon-bottleneck strategy of slowing down carrier relaxation by strong coupling of electrons to cooperative lattice modes."],["dc.identifier.doi","10.1103/PhysRevApplied.14.054006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83645"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B02 Photonen-getriebener Energietransfer über Grenzflächen zwischen Materialien mit starken Korrelationen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation","SFB 1073 | Topical Area Z | Z02 Hochauflösende Charakterisierung von Grenzflächen"],["dc.relation.eissn","2331-7019"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY 4.0"],["dc.title","Room-Temperature Hot-Polaron Photovoltaics in the Charge-Ordered State of a Layered Perovskite Oxide Heterojunction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"],["local.message.claim","2022-01-20T08:58:36.159+0000|||rp114901|||submit_approve|||dc_contributor_author|||None"]]

[["dc.bibliographiccitation.artnumber","2387"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Merten, S."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Damaschke, B."],["dc.contributor.author","Samwer, K."],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2019-07-09T11:51:04Z"],["dc.date.available","2019-07-09T11:51:04Z"],["dc.date.issued","2019"],["dc.description.abstract","A long-standing issue in the physics of the colossal magnetoresistance is the role of electron-phonon coupling, which manifests itself as Jahn-Teller polarons. The origin and architecture of polarons makes it possible to study their behavior by Raman spectroscopy, which allows to analyze the polaronic behavior in an applied magnetic field. We performed magnetic-field-dependent Raman spectroscopy on thin films of (La0.6Pr0.4)0.7Ca0.3MnO3 in a range of H = 0-50 kOe and compared the obtained Raman spectra with the magnetic field behavior of the electrical resistivity. In the vicinity of the Curie temperature, TC = 197 K, the intensity of the Jahn-Teller stretching mode at 614 cm-1 and of the bending mode at 443 cm-1 was found to be suppressed and enhanced, respectively. This observed behavior has a remarkable similarity with the field and temperature dependence of the colossal magnetoresistance in (La0.6Pr0.4)0.7Ca0.3MnO3. Our work provides direct evidence that the reduction of the amount of Jahn-Teller polarons at the phase transition is the main mechanism underlying the colossal magnetoresistance."],["dc.identifier.doi","10.1038/s41598-019-39597-1"],["dc.identifier.pmid","30787387"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16040"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59867"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B01 Photon-induced structural phase transition controlled by electronic correlations"],["dc.relation","SFB 1073 | Topical Area B | B04 External field control of photon energy conversion in manganites"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","530"],["dc.title","Magnetic-Field-Induced Suppression of Jahn-Teller Phonon Bands in (La0.6Pr0.4)0.7Ca0.3MnO3: the Mechanism of Colossal Magnetoresistance shown by Raman Spectroscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","734"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Crystals"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Ksoll, Philipp"],["dc.contributor.author","Meyer, Christoph"],["dc.contributor.author","Schüler, Leonard"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2021-08-12T07:45:54Z"],["dc.date.available","2021-08-12T07:45:54Z"],["dc.date.issued","2021"],["dc.description.abstract","The preparation of cation-ordered thin films of correlated oxides is of great interest for both fundamental and applied research. The scientific long-term vision is strongly motivated by the perspective of studying electronic correlations in condensed matter without the presence of chemical or quenched disorder. A promising material platform provides double perovskite A2BB’O6 bulk samples with different types of B/B’ ordering. However, the growth of A- and/or B-site-ordered correlated oxide thin films is known to be a challenging task. In this review, we evaluate the growth of double perovskite A2BB’O6 thin films by means of well-elaborated physical vacuum deposition techniques, such as pulsed laser deposition (PLD) and sputtering and compare them with a close-to-equilibrium growth with the metalorganic aerosol deposition (MAD) technique. The latter was further developed to grow an emergent interfacial double perovskite phase in LaNiO3/LaMnO3 superlattices, and finally, by way of a layer-by-layer route. The growth of La2CoMnO6 films on SrTiO3(111) substrates by sequential deposition of single perovskite layers of LaCoO3/LaMnO3/LaCoO3/… was demonstrated and the film properties were compared to those obtained within the state-of-the art growth mode."],["dc.description.abstract","The preparation of cation-ordered thin films of correlated oxides is of great interest for both fundamental and applied research. The scientific long-term vision is strongly motivated by the perspective of studying electronic correlations in condensed matter without the presence of chemical or quenched disorder. A promising material platform provides double perovskite A2BB\\’O6 bulk samples with different types of B/B\\’ ordering. However, the growth of A- and/or B-site-ordered correlated oxide thin films is known to be a challenging task. In this review, we evaluate the growth of double perovskite A2BB\\’O6 thin films by means of well-elaborated physical vacuum deposition techniques, such as pulsed laser deposition (PLD) and sputtering and compare them with a close-to-equilibrium growth with the metalorganic aerosol deposition (MAD) technique. The latter was further developed to grow an emergent interfacial double perovskite phase in LaNiO3/LaMnO3 superlattices, and finally, by way of a layer-by-layer route. The growth of La2CoMnO6 films on SrTiO3(111) substrates by sequential deposition of single perovskite layers of LaCoO3/LaMnO3/LaCoO3/… was demonstrated and the film properties were compared to those obtained within the state-of-the art growth mode."],["dc.identifier.doi","10.3390/cryst11070734"],["dc.identifier.pii","cryst11070734"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/88569"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-448"],["dc.publisher","MDPI"],["dc.relation.eissn","2073-4352"],["dc.rights","https://creativecommons.org/licenses/by/4.0/"],["dc.title","B-Site Cation Ordering in Films, Superlattices, and Layer-by-Layer-Grown Double Perovskites"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","125306"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Journal of Physics D: Applied Physics"],["dc.bibliographiccitation.volume","51"],["dc.contributor.affiliation","Lyzwa, F;"],["dc.contributor.affiliation","Marsik, P;"],["dc.contributor.affiliation","Roddatis, V;"],["dc.contributor.affiliation","Bernhard, C;"],["dc.contributor.affiliation","Jungbauer, M;"],["dc.contributor.affiliation","Moshnyaga, V;"],["dc.contributor.author","Lyzwa, F."],["dc.contributor.author","Marsik, P."],["dc.contributor.author","Roddatis, V."],["dc.contributor.author","Bernhard, C."],["dc.contributor.author","Jungbauer, M."],["dc.contributor.author","Moshnyaga, V."],["dc.date.accessioned","2020-12-10T18:15:40Z"],["dc.date.available","2020-12-10T18:15:40Z"],["dc.date.issued","2018"],["dc.date.updated","2022-02-09T13:18:51Z"],["dc.description.abstract","Abstract We report on the use of time-resolved optical ellipsometry to monitor the deposition of single atomic layers with subatomic sensitivity. Ruddlesden–Popper thin films of SrO(SrTiO3)n=4 were grown by means of metalorganic aerosol deposition in the atomic layer epitaxy mode on SrTiO3(1 0 0), LSAT(1 0 0) and DyScO3(1 1 0) substrates. The measured time dependences of ellipsometric angles, Δ(t) and Ψ(t), were described by using a simple optical model, considering the sequence of atomic layers SrO and TiO2 with corresponding bulk refractive indices. As a result, valuable online information on the atomic layer epitaxy process was obtained. Ex situ characterization techniques, i.e. transmission electron microscopy, x-ray diffraction and x-ray reflectometry verify the crystal structure and confirm the predictions of optical ellipsometry."],["dc.description.sponsorship","EU FP 7 Project ‘IFOX’"],["dc.description.sponsorship","Swiss National Foundation"],["dc.identifier.doi","10.1088/1361-6463/aaac64"],["dc.identifier.eissn","1361-6463"],["dc.identifier.issn","0022-3727"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74921"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.publisher","IOP Publishing"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights.uri","http://creativecommons.org/licenses/by/3.0/"],["dc.title","In situ monitoring of atomic layer epitaxy via optical ellipsometry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Physical review materials"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Merten, S."],["dc.contributor.author","Bruchmann-Bamberg, V."],["dc.contributor.author","Damaschke, B."],["dc.contributor.author","Samwer, K."],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2020-12-10T18:25:52Z"],["dc.date.available","2020-12-10T18:25:52Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1103/PhysRevMaterials.3.060401"],["dc.identifier.eissn","2475-9953"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16433"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75864"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B01 Photon-induced structural phase transition controlled by electronic correlations"],["dc.relation","SFB 1073 | Topical Area B | B04 External field control of photon energy conversion in manganites"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Jahn-Teller reconstructed surface of the doped manganites shown by means of surface-enhanced Raman spectroscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5868"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Nano Letters"],["dc.bibliographiccitation.lastpage","5874"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","O'Shea, Kerry J."],["dc.contributor.author","MacLaren, Donald A."],["dc.contributor.author","McGrouther, Damien"],["dc.contributor.author","Schwarzbach, Danny"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Stamps, Robert L."],["dc.date.accessioned","2018-11-07T09:52:25Z"],["dc.date.available","2018-11-07T09:52:25Z"],["dc.date.issued","2015"],["dc.description.abstract","Spatially resolved analysis of magnetic properties on the nanoscale remains challenging, yet strain and defects on this length-scale can profoundly affect a material's bulk performance. We present a detailed investigation of the magnetic properties of La0.67Sr0.33MnO3 thin films in both free-standing and nanowire form and assess the role of strain and local defects in modifying the films' magnetic properties. Lorentz transmission electron microscopy is used to measure the magnetocrystalline anisotropy and to map the Curie temperature and saturation magnetization with nanometric spatial resolution. Atomic-scale defects are identified as pinning sites for magnetic domain wall propagation. Measurement of domain wall widths and crystalline strain are used to identify a strong magnetoelastic contribution to the magnetic anisotropy. Together, these results provide unique insight into the relationship between the nanostructure and magnetic functionality of a ferromagnetic complex oxide film."],["dc.identifier.doi","10.1021/acs.nanolett.5b01953"],["dc.identifier.isi","000361252700031"],["dc.identifier.pmid","26252745"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12152"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36121"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/246102/EU//IFOX"],["dc.relation.issn","1530-6992"],["dc.relation.issn","1530-6984"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Nanoscale Mapping of the Magnetic Properties of (111)-Oriented La0.67Sr0.33MnO3"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","747"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Crystals"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Meyer, Christoph"],["dc.contributor.author","Ksoll, Philipp"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2021-08-12T07:45:54Z"],["dc.date.available","2021-08-12T07:45:54Z"],["dc.date.issued","2021"],["dc.description.abstract","Two series of B-site ordered, double-perovskite A2CoMnO6 and A2NiMnO6 (A = La, Pr, Nd, Sm, Gd) epitaxial films with thickness d ~ 100 nm were grown on SrTiO3(111) substrates via metalorganic aerosol deposition. Polarization and temperature-dependent Raman spectroscopy were carried out in order to determine the spin-phonon coupling constant, λ, and the impact of the A-site cation radius on the phonon properties. The reduction of the A-site cation radius from La3+ down to Gd3+ systematically shifts the Raman modes to lower wavenumbers, and decreases the magnetization-induced softening of the Ag breathing mode, described by the spin-phonon coupling constant, λ, which changes from λ = 1.42 cm−1 (La2CoMnO6) and λ = 1.53 cm−1 (La2NiMnO6) down to λ = 0.58 cm−1 (Gd2CoMnO6) and λ = 0.44 cm−1 (Gd2NiMnO6). A similar effect of the A-cation radius was established for the c-lattice parameter and Curie temperature, TC, in this series of double-perovskite films. Our observations directly demonstrate a strong impact of the lattice structure on the ferromagnetic superexchange interaction in double perovskites. Moreover, the A2CoMnO6 and A2NiMnO6 series exhibit very similar behavior of spin-phonon coupling due to the only moderate difference of Co2+ and Ni2+ cation size."],["dc.description.abstract","Two series of B-site ordered, double-perovskite A2CoMnO6 and A2NiMnO6 (A = La, Pr, Nd, Sm, Gd) epitaxial films with thickness d ~ 100 nm were grown on SrTiO3(111) substrates via metalorganic aerosol deposition. Polarization and temperature-dependent Raman spectroscopy were carried out in order to determine the spin-phonon coupling constant, λ, and the impact of the A-site cation radius on the phonon properties. The reduction of the A-site cation radius from La3+ down to Gd3+ systematically shifts the Raman modes to lower wavenumbers, and decreases the magnetization-induced softening of the Ag breathing mode, described by the spin-phonon coupling constant, λ, which changes from λ = 1.42 cm−1 (La2CoMnO6) and λ = 1.53 cm−1 (La2NiMnO6) down to λ = 0.58 cm−1 (Gd2CoMnO6) and λ = 0.44 cm−1 (Gd2NiMnO6). A similar effect of the A-cation radius was established for the c-lattice parameter and Curie temperature, TC, in this series of double-perovskite films. Our observations directly demonstrate a strong impact of the lattice structure on the ferromagnetic superexchange interaction in double perovskites. Moreover, the A2CoMnO6 and A2NiMnO6 series exhibit very similar behavior of spin-phonon coupling due to the only moderate difference of Co2+ and Ni2+ cation size."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.identifier.doi","10.3390/cryst11070747"],["dc.identifier.pii","cryst11070747"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/88570"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-448"],["dc.publisher","MDPI"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation.eissn","2073-4352"],["dc.rights","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Spin-Phonon Coupling in A2BMnO6 (A = La, Pr, Nd, Sm, Gd; B = Co, Ni) Double-Perovskite Thin Films: Impact of the A-Site Cation Radius"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]