Enhanced Multiferroicity in LuFeO$_{3}$ Through Sc Doping

ORAL

Abstract

Hexagonal manganites of the type \textit{R}MnO$_{3}$ are well known examples of single-phase multiferroic materials, but suffer from low magnetic ordering temperatures and weak magnetoelectric coupling making them unsuitable for implementation in devices. Recently, the isostructural ferrites \textit{R}FeO$_{3}$ have been proposed as promising materials to exhibit greatly enhanced magnetic properties, including a much stronger coupling mechanism between ferromagnetic moment and ferroelectic polarization. Here we present a magnetometry and neutron scattering investigation of LuFeO$_{3}$ forced into the ferroelectric structure through Sc-doping. We find the magnetic ordering temperature dramatically increases relative to pure hexagonal LuFeO$_{3}$ and LuMnO$_{3}$, as well as an unusual spin-reorientation at low temperatures. We will discuss possible mechanisms for this reorientation and how it provides insight into the enhanced magnetic properties Limit of the \textit{R}FeO$_{3}$ series.

*Supported in part by DOE Grant No. DE-FG02-07ER46382

Authors

  • Steven Disseler

    • NIST
    • NIST Center for Neutron Research
  • Yoon Seok Oh

    • Department of Physics and Astronomy, Rutgers University
  • Rongwei Hu

    • Department of Physics and Astronomy, Rutgers University
  • Xuan Luo

    • Pohong University of Science and Technology
  • J. W. Lynn

    • Center for Neutron Research, NIST
    • NIST Center for Neutron Research
    • NIST Center for Neutron Research, Gaithersburg, Maryland, 20899, USA
  • S.-W. Cheong

    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Piscataway, New Jersey 08854, USA
    • Rutgers University, Piscataway, USA
    • Department of Physics and Astronomy, Rutgers University
    • Rutgers University
  • William Ratcliff

    • NIST
    • National Institute of Standards and Technology
    • NIST Center for Neutron Research