Strain engineering induced interfacial self-assembly and intrinsic exchange bias in a manganite perovskite film

The control of complex oxide heterostructures at atomic level generates a rich spectrum of exotic properties and unexpected states at the interface between two separately prepared materials. The frustration of magnetization and conductivity of manganite perovskite at surface/interface which is inimi...

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Veröffentlicht in:Scientific reports Jg. 3; H. 1; S. 2542
Hauptverfasser: Cui, B., Song, C., Wang, G. Y., Mao, H. J., Zeng, F., Pan, F.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 29.08.2013
Nature Publishing Group
Schlagworte:
639/301/119/544
639/301/119/997
639/766/25
639/925/357/1018
Bias
Engineering
Humanities and Social Sciences
Interfaces
multidisciplinary
Science
Self-assembly
Spectrum analysis
ISSN:2045-2322, 2045-2322
Online-Zugang:Volltext
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Zusammenfassung:The control of complex oxide heterostructures at atomic level generates a rich spectrum of exotic properties and unexpected states at the interface between two separately prepared materials. The frustration of magnetization and conductivity of manganite perovskite at surface/interface which is inimical to their device applications, could also flourish in tailored functionalities in return. Here we prove that the exchange bias (EB) effect can unexpectedly emerge in a (La,Sr)MnO 3 (LSMO) “single” film when large compressive stress imposed through a lattice mismatched substrate. The intrinsic EB behavior is directly demonstrated to be originating from the exchange coupling between ferromagnetic LSMO and an unprecedented LaSrMnO 4 -based spin glass, formed under a large interfacial strain and subsequent self-assembly. The present results not only provide a strategy for producing a new class of delicately functional interface by strain engineering, but also shed promising light on fabricating the EB part of spintronic devices in a single step.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep02542