Examination of exchange fields at LaSrMnO$_3$/BiFeO$_3$ interfaces

ORAL

Abstract

The complex oxide materials are providing a vast playground of interesting material properties that couples spin, orbital, and charge degrees of freedom. We examine the presence of significant magnetization within the antiferromagnetic layer of BiFeO$_3$ (BFO) between ferromagnetic (FM) LaSrMnO$_3$ layers. Using a classical exchange field to account for orbital reconstruction and possible inter-layer mixing, we quantify the energy scale for the interface exchange based from polarized neutron reflectivity measurements. Furthermore, we estimate the critical layer thickness in which the magnetization will be reduced to zero (or close to zero).

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Authors

  • Jason Haraldsen

    • Department of Physics and Astronomy, James Madison University
    • Los Alamos National Laboratory and James Madison University
    • James Madison University

  • Jian-Xin Zhu

    • Los Alamos National Laboratory
    • Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
    • Theoretical Division and Center for Integrated Technologies, Los Alamos National Laboratory
    • Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
    • Los Alamos National Lab
    • Theoretical Division and Center for Nonlinear Studies, LANL, Los Alamos, New Mexico 87545, USA
    • Los Alamos Natl Lab

  • Alexander Balatsky

    • Los Alamos National Laboratory
    • Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Los Alamos National Laboratory and Nordic Institute of Theoretical Physics (Nordita)