Moshnyaga, Vasily T.

[["dc.bibliographiccitation.artnumber","17D701"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","113"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Michelmann, M."],["dc.contributor.author","Massel, F."],["dc.contributor.author","Koeth, F."],["dc.contributor.author","Ballani, C."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T09:24:44Z"],["dc.date.available","2018-11-07T09:24:44Z"],["dc.date.issued","2013"],["dc.description.abstract","Colossal magnetoresistance (CMR) and nm-scale electronic inhomogeneity close to the first order phase transition in perovskite manganites, e.g., (La1-yPry)(0.67)Ca0.33MnO3 still remain a puzzling phenomenon. We experimentally model a metal-insulator phase coexistence by growing a short period (LCMOn/PCMOn)(m) superlattices (SLs) with the same thickness for both components. CMR effect was studied as a function of the individual layer thickness n = 2-8 and then compared with chemically homogeneous (La1-yPry)(0.67)Ca0.33MnO3 LPCMO films. We show that SLs can be superimposed in the phase diagram of LPCMO. The results also point out the importance of the nm-scale electronic rather than chemical separation for realization of the CMR effect as well as limits the lowest boundary for the thickness of an individual manganite material to n similar to 4u.c. (C) 2013 American Institute of Physics."],["dc.identifier.doi","10.1063/1.4793711"],["dc.identifier.isi","000319292800219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29895"],["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","Modeling of colossal magnetoresistance in La0.67Ca0.33MnO3/Pr0.67Ca0.33MnO3 superlattices: Comparison with individual (La1-yPry)(0.67)Ca0.33MnO3 films"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","17D709"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","113"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Michelmann, M."],["dc.contributor.author","Goering, Richard V."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T09:24:44Z"],["dc.date.available","2018-11-07T09:24:44Z"],["dc.date.issued","2013"],["dc.description.abstract","Exchange bias (EB) has been observed for all-manganite La0.7Sr0.3MnO3/SrMnO3/La0.7Sr0.3MnO3 trilayers with ferromagnetic La0.7Sr0.3MnO3 and G-type antiferromagnetic SrMnO3 (SMO) layers, grown on (001) SrTiO3 substrates by metalorganic aerosol deposition. The field shift of the magnetic hysteresis loop H-E and the coercivity H-C decay exponentially with temperature. H-E exhibits a global maximum as a function of SMO interlayer thickness at t(SMO) approximate to 4.5 nm. We argue that EB behaviour can be explained by the interplay of a spinglass state at the interface and theoretically proposed mechanism based on the Dzyaloshinskii-Moriya interaction. (C) 2013 American Institute of Physics."],["dc.identifier.doi","10.1063/1.4798349"],["dc.identifier.isi","000319292800227"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29896"],["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","Exchange bias in La0.7Sr0.3MnO3/SrMnO3/La0.7Sr0.3MnO3 trilayers"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9835"],["dc.bibliographiccitation.issue","21"],["dc.bibliographiccitation.journal","Nanoscale"],["dc.bibliographiccitation.lastpage","9843"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Egoavil, R."],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Gauquelin, N."],["dc.contributor.author","Beche, A."],["dc.contributor.author","van Tendeloo, G."],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T10:03:14Z"],["dc.date.available","2018-11-07T10:03:14Z"],["dc.date.issued","2015"],["dc.description.abstract","Epitaxial double perovskite La2CoMnO6 (LCMO) films were grown by metalorganic aerosol deposition on SrTiO3(111) substrates. A high Curie temperature, T-C = 226 K, and large magnetization close to saturation, M-S(5 K) = 5.8 mu(B)/f.u., indicate a 97% degree of B-site (Co,Mn) ordering within the film. The Co/Mn ordering was directly imaged at the atomic scale by scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy (STEM-EDX). Local electron-energy-loss spectroscopy (EELS) measurements reveal that the B-sites are predominantly occupied by Co2+ and Mn4+ ions in quantitative agreement with magnetic data. Relatively small values of the (1/2 1/2 1/2) superstructure peak intensity, obtained by X-ray diffraction (XRD), point out the existence of ordered domains with an arbitrary phase relationship across the domain boundary. The size of these domains is estimated to be in the range 35-170 nm according to TEM observations and modelling the magnetization data. These observations provide important information towards the complexity of the cation ordering phenomenon and its implications on magnetism in double perovskites, and similar materials."],["dc.identifier.doi","10.1039/c5nr01642h"],["dc.identifier.isi","000354983100060"],["dc.identifier.pmid","25965406"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38413"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc Chemistry"],["dc.relation.issn","2040-3372"],["dc.relation.issn","2040-3364"],["dc.title","Phase problem in the B-site ordering of La2CoMnO6: impact on structure and magnetism"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","9"],["dc.bibliographiccitation.journal","Micron"],["dc.bibliographiccitation.lastpage","15"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","O'Shea, K. J."],["dc.contributor.author","McGrouther, Damien"],["dc.contributor.author","Ferguson, C. A."],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","MacLaren, Donald A."],["dc.date.accessioned","2018-11-07T09:33:22Z"],["dc.date.available","2018-11-07T09:33:22Z"],["dc.date.issued","2014"],["dc.description.abstract","We describe a technique using a focused ion beam instrument to fabricate high quality plan-view specimens for transmission electron microscopy studies. The technique is simple, site-specific and is capable of fabricating multiple large, >100 mu m(2) electron transparent windows within epitaxially grown thin films. A film of La0.67Sr0.33MnO3 is used to demonstrate the technique and its structural and functional properties are surveyed by high resolution imaging, electron spectroscopy, atomic force microscopy and Lorentz electron microscopy. The window is demonstrated to have good thickness uniformity and a low defect density that does not impair the film's Curie temperature. The technique will enable the study of in-plane structural and functional properties of a variety of epitaxial thin film systems. (C) 2014 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.micron.2014.04.011"],["dc.identifier.isi","000340852700002"],["dc.identifier.pmid","25080271"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31949"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0968-4328"],["dc.title","Fabrication of high quality plan-view TEM specimens using the focused ion beam"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","251603"],["dc.bibliographiccitation.issue","25"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.volume","105"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Egoavil, R."],["dc.contributor.author","Tan, H."],["dc.contributor.author","Verbeeck, J."],["dc.contributor.author","van Tendeloo, G."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T09:31:08Z"],["dc.date.available","2018-11-07T09:31:08Z"],["dc.date.issued","2014"],["dc.description.abstract","We report an atomic layer epitaxial growth of Ruddlesden-Popper (RP) thin films of SrO(SrTiO3)(n) (n = infinity, 2, 3, 4) by means of metalorganic aerosol deposition (MAD). The films are grown on SrTiO3(001) substrates by means of a sequential deposition of Sr-O/Ti-O-2 atomic monolayers, monitored in-situ by optical ellipsometry. X-ray diffraction and transmission electron microscopy (TEM) reveal the RP structure with n = 2-4 in accordance with the growth recipe. RP defects, observed by TEM in a good correlation with the in-situ ellipsometry, mainly result from the excess of SrO. Being maximal at the film/substrate interface, the SrO excess rapidly decreases and saturates after 5-6 repetitions of the SrO(SrTiO3)(4) block at the level of 2.4%. This identifies the SrTiO3 substrate surface as a source of RP defects under oxidizing conditions within MAD. Advantages and limitations of MAD as a solution-based and vacuum-free chemical deposition route were discussed in comparison with molecular beam epitaxy. (C) 2014 AIP Publishing LLC."],["dc.identifier.doi","10.1063/1.4905055"],["dc.identifier.isi","000346914000007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31472"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.relation.issn","1077-3118"],["dc.relation.issn","0003-6951"],["dc.title","Atomic layer epitaxy of Ruddlesden-Popper SrO(SrTiO3)(n) films by means of metalorganic aerosol deposition"],["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.firstpage","46"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Raman Spectroscopy"],["dc.bibliographiccitation.lastpage","52"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Meyer, Christoph"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Jungbauer, Markus"],["dc.contributor.author","Merten, Sebastian"],["dc.contributor.author","Damaschke, Bernd"],["dc.contributor.author","Samwer, Konrad H."],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.date.accessioned","2018-11-07T10:29:18Z"],["dc.date.available","2018-11-07T10:29:18Z"],["dc.date.issued","2017"],["dc.description.abstract","Polarization-dependent tip-enhanced Raman spectroscopy (TERS) was carried out on double perovskite La2CoMnO6 (LCMO) thin films to determine the contributions of the enhancement by the excitation of surface plasmon polariton and tip-induced polarization effects. Due to B-site ordering and the resulting monoclinic P12(1)/n1 structure, the spectra exhibit a strong A(g) mode around 644cm(-1) originated from (Co/Mn)O-6 stretching vibrations. The TERS contrast C, defined as the ratio of the total-field (the sum of the near field and the far field) to the far-field intensity, up to C similar to 60-110 for a cross-polarized configuration (incident light polarization perpendicular to the detected one), reveals a possible breakdown of polarization-dependent selection rules for the Raman scattering due to a tip-induced near-field depolarization component. We disentangled a significant enhancement for all observed modes in a parallel configuration with a TERS contrast of C similar to 2-5 due to general near-field amplification, strongly affected also by the film thickness. With B-site ordering and highly dielectric behavior, LCMO therefore provides an excellent test system to study TERS phenomena on oxide surfaces. Copyright (c) 2016 John Wiley & Sons, Ltd."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft DFG [Sonderforschungsbereich SFB 1073]"],["dc.identifier.doi","10.1002/jrs.4986"],["dc.identifier.isi","000392427000006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43614"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["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","1097-4555"],["dc.relation.issn","0377-0486"],["dc.title","Tip-enhanced Raman spectroscopy (TERS) on double perovskite La2CoMnO6 thin films: field enhancement and depolarization effects"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","456003"],["dc.bibliographiccitation.issue","45"],["dc.bibliographiccitation.journal","Journal of Physics. Condensed Matter"],["dc.bibliographiccitation.volume","26"],["dc.contributor.author","Finizio, Simone"],["dc.contributor.author","Foerster, M."],["dc.contributor.author","Krueger, B."],["dc.contributor.author","Vaz, C. A. F."],["dc.contributor.author","Miyawaki, T."],["dc.contributor.author","Mawass, M. A."],["dc.contributor.author","Pena, Luis"],["dc.contributor.author","Mechin, Laurence"],["dc.contributor.author","Huehn, Sebastian"],["dc.contributor.author","Moshnyaga, Vasily T."],["dc.contributor.author","Buettner, F."],["dc.contributor.author","Bisig, A."],["dc.contributor.author","Le Guyader, L."],["dc.contributor.author","El Moussaoui, S."],["dc.contributor.author","Valencia, S."],["dc.contributor.author","Kronast, F."],["dc.contributor.author","Eisebitt, Stefan"],["dc.contributor.author","Kläui, M."],["dc.date.accessioned","2018-11-07T09:32:40Z"],["dc.date.available","2018-11-07T09:32:40Z"],["dc.date.issued","2014"],["dc.description.abstract","We investigate the effect of electric current pulse injection on domain walls in La0.7Sr0.3MnO3 (LSMO) half-ring nanostructures by high resolution x-ray magnetic microscopy at room temperature. Due to the easily accessible Curie temperature of LSMO, we can employ reasonable current densities to induce the Joule heating necessary to observe effects such as hopping of the domain walls between different pinning sites and nucleation/annihilation events. Such effects are the dominant features close to the Curie temperature, while spin torque is found to play a small role close to room temperature. We are also able to observe thermally activated domain wall transformations and we find that, for the analyzed geometries, the vortex domain wall configuration is energetically favored, in agreement with micromagnetic simulations."],["dc.identifier.doi","10.1088/0953-8984/26/45/456003"],["dc.identifier.isi","000343796200017"],["dc.identifier.pmid","25336527"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31800"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1361-648X"],["dc.relation.issn","0953-8984"],["dc.title","Domain wall transformations and hopping in La0.7Sr0.3MnO3 nanostructures imaged with high resolution x-ray magnetic microscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]