Moshnyaga, Vasily T.

[["dc.bibliographiccitation.artnumber","232405"],["dc.bibliographiccitation.issue","23"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.volume","109"],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Bruchmann-Bamberg, V."],["dc.contributor.author","Samwer, Konrad H."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T10:04:37Z"],["dc.date.available","2018-11-07T10:04:37Z"],["dc.date.issued","2016"],["dc.description.abstract","We report on the interface engineering in correlated manganite heterostructures by octahedral decoupling using embedded stacks of atomic layers that form the Ruddlesden-Popper structure. A room temperature magnetic decoupling was achieved through deposition of a (SrO)(2)-TiO2-(SrO)(2) sequence of atomic layers at the interface between La0.7Sr0.3MnO3 and La0.7Sr0.3Mn0.9Ru0.1O3 films. Moreover, the narrowing of the interfacial dead layer in ultrathin La0.7Sr0.3MnO3 films was demonstrated by insertion of a single (SrO)(2) rock-salt layer at the interface with the SrTiO3(100) substrate. The obtained results are discussed based on the symmetry breaking and disconnection of the MnO6 octahedra network at the interface that may lead to the improved performance of all-oxide magnetic tunnel junctions. We suggest that octahedral decoupling realized by formation of Ruddlesden-Popper interfaces is an effective structural mechanism to control functionalities of correlated perovskite heterostructures. Published by AIP Publishing."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [SFB 1073]"],["dc.identifier.doi","10.1063/1.4971833"],["dc.identifier.isi","000390677700026"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38737"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["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","1077-3118"],["dc.relation.issn","0003-6951"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Ruddlesden-Popper interface in correlated manganite heterostructures induces magnetic decoupling and dead layer reduction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["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.firstpage","7360"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.lastpage","7362"],["dc.bibliographiccitation.volume","95"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Giske, A."],["dc.contributor.author","Samwer, Konrad H."],["dc.contributor.author","Mishina, E."],["dc.contributor.author","Tamura, T."],["dc.contributor.author","Nakabayashi, S."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Kulyuk, L."],["dc.date.accessioned","2018-11-07T10:48:31Z"],["dc.date.available","2018-11-07T10:48:31Z"],["dc.date.issued","2004"],["dc.description.abstract","The increase of the resistance up to two orders of magnitude under laser illumination (lambda=760 nm) was observed in La0.7Ca0.3MnO3 (LCMO) epitaxial thin films in ferromagnetic state. Optical absorption also increases by 10-15 % and the magnetic second-harmonic generation signal decreases down to zero under the irradiation. The light induced changes are reversible with characteristic relaxation times tausimilar to1-30 s. Magnetic field, B=4 T, suppresses the photoconductivity and decreases its relaxation time. Photoinduced effects are caused by the injection of a large number of extra carriers, which change the (antiferromagnetic) AFM/FM phase balance in LCMO, favoring the insulating AFM state. (C) 2004 American Institute of Physics."],["dc.identifier.doi","10.1063/1.1687555"],["dc.identifier.isi","000221657900280"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48216"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.publisher.place","Melville"],["dc.relation.conference","9th Joint Magnetism and Magnetic Materials Conference/ International Magnetics Conference"],["dc.relation.eventlocation","Anaheim, CA"],["dc.relation.issn","0021-8979"],["dc.title","Giant negative photoconductivity in La0.7Ca0.3MnO3 thin films"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","104421"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW B"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","van Tendeloo, G."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Damashcke, B."],["dc.contributor.author","Samwer, Konrad H."],["dc.date.accessioned","2018-11-07T10:08:30Z"],["dc.date.available","2018-11-07T10:08:30Z"],["dc.date.issued","2002"],["dc.description.abstract","Composite (La0.67Ca0.33MnO3)(1-x):(MgO)(x) films were prepared by metalorganic aerosol deposition on a (100)MgO substrate for different concentrations of the (MgO) phase (0less than or equal toxless than or equal to0.8). At xapproximate to0.3 a percolation threshold in conductivity is reached, at which an infinite insulating MgO cluster forms around the La0.67Ca0.33MnO3 grains. This yields a drastic increase of the electrical resistance for films with x>0.3. The film structure is characterized by x-ray diffraction and transmission electron microscopy. The local structure of the La0.67Ca0.33MnO3 within the film depends on the MgO concentration which grows epitaxially along the domain boundaries. A different structural phase transition from the orthorhombic Pnma structure to an unusual rhombohedral R (3) over barc structure at the percolation threshold xapproximate to0.3 is found for La0.67Ca0.33MnO3. A three-dimensional stress accommodation in thick films through a phase transition is suggested."],["dc.identifier.doi","10.1103/PhysRevB.66.104421"],["dc.identifier.isi","000178460900060"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39476"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","American Physical Soc"],["dc.relation.issn","1098-0121"],["dc.title","Structural phase transitions and stress accommodation in (La0.67Ca0.33MnO3)(1-x):(MgO)(x) composite films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","134413"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW B"],["dc.bibliographiccitation.volume","79"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Gehrke, Kai"],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","Sudheendra, L."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Raabe, Stephanie"],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","van Tendeloo, G."],["dc.contributor.author","Samwer, Konrad H."],["dc.date.accessioned","2018-11-07T08:31:23Z"],["dc.date.available","2018-11-07T08:31:23Z"],["dc.date.issued","2009"],["dc.description.abstract","The metal-insulator (MI) transition in epitaxial thin films of La(0.75)Ca(0.25)MnO(3) (LCMO) is accompanied by the appearance of an intrinsic electrical nonlinearity. The latter, probed by electrical third harmonic voltage, U(3 omega), or resistance, R(3 omega)=dU(3 omega)/dJ, is drastically enhanced in the vicinity of the MI transition, T(MI)=267 K. Applied magnetic field, B=5 T, suppresses the nonlinearity, resulting in a huge \"nonlinear\" CMR(3 omega)(T(MI))similar to 10(5)%. R(3 omega) shows a peculiar low-frequency (omega <= 1 kHz) dependence, R(3 omega)similar to(omega-omega(0))(n), with exponent, n, changing across the MI transition from n similar to 1,5-2 for T >= T(MI) to n=1 (T < T(MI)). The observed electrical nonlinearity in LCMO reflects the behavior of correlated polarons, the number of which dramatically enhances in the vicinity of T(MI). We argued that correlated polarons, considered as electric-elastic quadrupoles, provide a nonlinear (quadratic) coupling to the electric field, yielding a third harmonic electric nonlinearity in LCMO. The reference film of La(0.7)Sr(0.3)MnO(3) (LSMO), a prototypic double exchange system with second-order phase transition, is characterized as a linear metallic material in the whole range of temperatures (T=10-400 K), magnetic fields (B=0-5 T), and frequencies (omega=1-1000 Hz)."],["dc.description.sponsorship","European Union [026019 ESTEEM]"],["dc.identifier.doi","10.1103/PhysRevB.79.134413"],["dc.identifier.isi","000265942800074"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17112"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1098-0121"],["dc.title","Electrical nonlinearity in colossal magnetoresistance manganite films: Relevance of correlated polarons"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1648"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.lastpage","1650"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Köster, S. A."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Samwer, Konrad H."],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","van Tendeloo, Gustaaf"],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Belenchuk, A."],["dc.date.accessioned","2018-11-07T10:09:58Z"],["dc.date.available","2018-11-07T10:09:58Z"],["dc.date.issued","2002"],["dc.description.abstract","Composite thin films of (La0.7Sr0.3MnO3)(1-x):(MgO)(x) (x=0-0.5) were grown on Al2O3 (0001) substrates by a metalorganic aerosol deposition technique. A columnar growth of the films with the predominance of (111)- and ((1) over bar 10)-orientation was observed. Pure films (x=0) show a Curie temperature of T-C=362 K, a metallic behavior accompanied with a low residual resistivity rhosimilar to10(-4) Omega cm at T=4.2 K and a very small low-field magnetoresistance. Low amounts of MgO doping, x=0.05, result in a totally different electrical transport behavior which is a pronounced low-field magnetoresistance MR=25% at T=4.2 K. The MgO was found to be located at the interfaces between the grains thus building tunneling barriers and enhancing spin polarized tunneling similar to a system with vertical artificial tunnel junctions. (C) 2002 American Institute of Physics."],["dc.identifier.doi","10.1063/1.1503849"],["dc.identifier.isi","000177549200036"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39760"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0003-6951"],["dc.title","Doping of interfaces in (La0.7Sr0.3MnO3)(1-x):(MgO)(x) composite films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","247"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Nature Materials"],["dc.bibliographiccitation.lastpage","252"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Damaschke, Bernd"],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Faupel, J."],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","van Tendeloo, G."],["dc.contributor.author","Mucksch, M."],["dc.contributor.author","Tsurkan, V."],["dc.contributor.author","Tidecks, R."],["dc.contributor.author","Samwer, Konrad H."],["dc.date.accessioned","2018-11-07T10:39:50Z"],["dc.date.available","2018-11-07T10:39:50Z"],["dc.date.issued","2003"],["dc.description.abstract","'Colossal magnetoresistance' in perovskite manganites such as La0.7Ca0.3MnO3 (LCMO), is caused by the interplay of ferro-paramagnetic, metal-insulator and structural phase transitions. Moreover, different electronic phases can coexist on a very fine scale resulting in percolative electron transport. Here we report on (LCMO)(1-x):(MgO)(x) (0 < x less than or equal to 0.8) epitaxial nano-composite films in which the structure and magnetotransport properties of the manganite nanoclusters can be tuned by the tensile stress originating from the MgO second phase. With increasing x, the lattice of LCMO was found to expand, yielding a bulk tensile strain. The largest colossal magnetoresistance of 10(5)% was observed at the percolation threshold in the conductivity at x(c) approximate to 0.3, which is coupled to a structural phase transition from orthorhombic (0 < x less than or equal to 0.1) to rhombohedral R (3) over barc structure (0.33 less than or equal to x less than or equal to 0.8). An increase of the Curie temperature for the R (3) over barc phase was observed. These results may provide a general method for controlling the magnetotransport properties of manganite-based composite films by appropriate choice of the second phase."],["dc.identifier.doi","10.1038/nmat859"],["dc.identifier.isi","000182052700022"],["dc.identifier.pmid","12690398"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46149"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","1476-4660"],["dc.relation.issn","1476-1122"],["dc.title","Structural phase transition at the percolation threshold in epitaxial (La0.7Ca0.3MnO3)(1-X):(MgO)(X) nanocomposite films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","024420"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Physical Review. B"],["dc.bibliographiccitation.volume","89"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Kalkert, Christin"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","Merten, Sebastian"],["dc.contributor.author","Choi, K.-Y."],["dc.contributor.author","Lemmens, P."],["dc.contributor.author","Damaschke, Bernd"],["dc.contributor.author","Samwer, Konrad H."],["dc.date.accessioned","2018-11-07T09:44:53Z"],["dc.date.available","2018-11-07T09:44:53Z"],["dc.date.issued","2014"],["dc.description.abstract","A commonly believed picture of colossal magnetoresistance (CMR) effect is related to a first-order phase transition and electronic phase separation with coexisting ferromagnetic metallic and antiferromagnetic insulating phases. However, the underlying mechanism, i.e., the characteristic energy scale of the interacting phases and their spatial extent, is still under debate. Here we present experimental evidence on the existence of an effective antiferromagnetic coupling between the ferromagnetic nanodomains in epitaxial thin films of a classical CMR material (La1-yPry)(0.67)Ca0.33MnO3 with Pr doping, y = 0.375 and 0.4. This coupling yields to peculiar low-field CMR behavior with magnetic hysteresis and slow resistance relaxation, both induced by the magnetization reversal. The coercive field obeys a square-root temperature dependence for T << T-C and increases anomalously close to the phase transition. We modeled the magnetic structure within the phase-separation scenario as an assembly of single-domain ferromagnetic nanoparticles, antiferromagnetically coupled (pinned) by correlated Jahn-Teller polarons. The concentration of polarons increases drastically close to phase transition as indicated by the third harmonic of the electrical conductivity as well as Raman spectroscopy."],["dc.identifier.doi","10.1103/PhysRevB.89.024420"],["dc.identifier.isi","000332332700001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34495"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["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.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Intrinsic antiferromagnetic coupling underlies colossal magnetoresistance effect: Role of correlated polarons"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","17C711"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","113"],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T09:24:45Z"],["dc.date.available","2018-11-07T09:24:45Z"],["dc.date.issued","2013"],["dc.description.abstract","We report ferromagnetic, T-C = 240 K, and metallic, T-MI = 250 K, behaviors of a three unit cell thick interface engineered lanthanum manganite film, grown by metalorganic aerosol deposition technique on SrTiO3(100) substrates. Atomically resolved electron microscopy and chemical analysis show that ultrathin manganite films start to grow with La-O layer on a strongly Mn/Ti-intermixed interface, engineered by an additional deposition of 2 u.c. of Sr-Mn-O. Such interface engineering results in a hole-doped manganite layer and stabilizes ferromagnetism and metallic conductivity down to the thickness of d = 3 u.c. The films with d = 8 u.c. demonstrate a bulk-like transport behavior with T-MI similar to T-C = 310 - 330 K. (C) 2013 American Institute of Physics."],["dc.identifier.doi","10.1063/1.4795422"],["dc.identifier.isi","000319292800195"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29898"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.publisher.place","Melville"],["dc.relation.conference","12th Joint MMM-Intermag Conference"],["dc.relation.eventlocation","Chicago, IL"],["dc.relation.issn","1089-7550"],["dc.relation.issn","0021-8979"],["dc.title","Interface-controlled magnetism and transport of ultrathin manganite films"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","107205"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","97"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Sudheendra, L."],["dc.contributor.author","Lebedev, Oleg I."],["dc.contributor.author","Köster, S. A."],["dc.contributor.author","Gehrke, Kai"],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Damaschke, Bernd"],["dc.contributor.author","van Tendeloo, Gustaaf"],["dc.contributor.author","Samwer, Konrad H."],["dc.date.accessioned","2018-11-07T09:16:00Z"],["dc.date.available","2018-11-07T09:16:00Z"],["dc.date.issued","2006"],["dc.description.abstract","Epitaxial La3/4Ca1/4MnO3/MgO(100) (LCMO) thin film shows an unusual rhombohedral (R-3c) structure with a new perovskite superstructure at room temperature due to the CE-type ordering of La and Ca with modulation vector q=1/4[011]. A-site ordered film was found to be electronically homogeneous down to the 1 nm scale as revealed by scanning tunnelling microscopy/spectroscopy. In contrast, orthorhombic and A-site disordered LCMO demonstrate a mesoscopic phase separation far below the Curie temperature (T-C). Unique La/Ca ordering compensates the cation mismatch stress within one supercell, a(S)approximate to 1.55 nm, and enhances the electronic homogeneity. The phase separation does not seem to be a unique mechanism for the colossal magnetoresistance (CMR) as very large CMR approximate to 500% was also observed in A-site ordered films."],["dc.identifier.doi","10.1103/PhysRevLett.97.107205"],["dc.identifier.isi","000240384300058"],["dc.identifier.pmid","17025850"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27836"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0031-9007"],["dc.title","A-site ordering versus electronic inhomogeneity in colossally magnetoresistive manganite films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]