title: Strain engineering induced interfacial self-assembly and intrinsic exchange bias in a manganite perovskite film.
abstract: 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)MnO3 (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 LaSrMnO4-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.
authors.affiliation: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: B
authors.initials: B
authors.lastname: Cui
authors.forename: C
authors.initials: C
authors.lastname: Song
authors.forename: G Y
authors.initials: GY
authors.lastname: Wang
authors.forename: H J
authors.initials: HJ
authors.lastname: Mao
authors.forename: F
authors.initials: F
authors.lastname: Zeng
authors.forename: F
authors.initials: F
authors.lastname: Pan