Orbital Reconstruction Enhanced Exchange Bias in La(0.6)Sr(0.4)MnO(3)/Orthorhombic YMnO(3) Heterostructures

The exchange bias in ferromagnetic/multiferroic heterostructures is usually considered to originate from interfacial coupling. In this work, an orbital reconstruction enhanced exchange bias was discovered. As La(0.6)Sr(0.4)MnO(3) (LSMO) grown on YMnO(3) (YMO) suffers a tensile strain (a > c), the...

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Detalles Bibliográficos
Autores principales: Zheng, Dongxing, Jin, Chao, Li, Peng, Wang, Liyan, Feng, Liefeng, Mi, Wenbo, Bai, Haili
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4836304/
https://www.ncbi.nlm.nih.gov/pubmed/27090614
http://dx.doi.org/10.1038/srep24568
Descripción
Sumario:The exchange bias in ferromagnetic/multiferroic heterostructures is usually considered to originate from interfacial coupling. In this work, an orbital reconstruction enhanced exchange bias was discovered. As La(0.6)Sr(0.4)MnO(3) (LSMO) grown on YMnO(3) (YMO) suffers a tensile strain (a > c), the doubly degenerate e(g) orbital splits into high energy 3z(2) − r(2) and low energy x(2) − y(2) orbitals, which makes electrons occupy the localized x(2) − y(2) orbital and leads to the formation of antiferromagnetic phase in LSMO. The orbital reconstruction induced antiferromagnetic phase enhances the exchange bias in the LSMO/YMO heterostructures, lightening an effective way for electric-field modulated magnetic moments in multiferroic magnetoelectric devices.

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