Effects of the Size of the Rare Earth Ions on the Magnetism in h-RFeO<sub>3</sub>

ORAL

Abstract

Hexagonal ferrites (h-RFeO3, R: rare earth) are multiferroic materials that exhibit spontaneous magnetic and ferroelectric polarizations simultaneously. We have prepared epitaxial h-RFeO3 thin films for different R and studied their magnetic transition temperature TN and the saturation magnetic moments. We found that, when the size of the rare-earth ion is reduced, the magnetic transition temperature may become significantly higher (e.g. TN»125 and 200 K for h-YbFeO3 and h-ScFeO3 respectively), while the magnetic moment on the Fe ions becomes smaller. We attribute this significant increase of TN to the enhanced interlayer exchange interactions due to the larger lattice distortion caused by the reduced size of the rare earth ion.

*This work was supported by the NSF DMR-1454618.

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Presenters

  • Kishan Sinha

    • Univ of Nebraska - Lincoln

Authors

  • Kishan Sinha

    • Univ of Nebraska - Lincoln

  • Yaohua Liu

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab

  • Huibo Cao

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab
    • Oak Ridge National Lab
    • Oak Ridge Natl Lab
    • Quantum Condensed Matter Division , Oak Ridge National Laboratory

  • Xiao Wang

    • Bryn Mawr College
    • brynmawr
    • Physics , Bryn Mawr College

  • Xiaozhe Zhang

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Univ of Nebraska - Lincoln

  • Xuemei Cheng

    • Bryn Mawr College
    • brynmawr
    • Bryn Mawr Coll
    • Physics , Bryn Mawr College
    • Physics, Bryn Mawr College

  • Xiaoshan Xu

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Physics and Astronomy, Univ of Nebraska - Lincoln
    • Univ of Nebraska - Lincoln
    • University of Nebraska-Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln