Tunable Magnetic and Ferroelectric Order Parameters in Sr<sub>1-x</sub>Ba<sub>x</sub>Mn<sub>1-y</sub>Ti<sub>y</sub>O<sub>3</sub>

ORAL

Abstract

Multiferroic oxides have recently emerged as key materials with the potential to tackle the exploding demand for systems that enable efficient energy usage and enhance the functionality of spintronic devices. In this talk, I will discuss the recent development of single-site manganese-based multiferroic perovskite materials, Sr1-xBaxMn1-yTiyO3, with ferroelectric transition temperatures boosted to ~430 K. Using a series of temperature-dependent scattering experiments at various pressures, we demonstrate the tunable character of coupling between the magnetic and ferroelectric order parameters and show that ferroelectricity could be easily manipulated through the application of either external or chemical pressures. Measurements of the magnetic and structural properties under pressure allowed the construction of a detailed P-T phase diagram in which the diverse phases are delineated. Impressive spontaneous polarization values of ~30 μC/cm2, in agreement with Ti-free Sr1-xBaxMnO3, are calculated using an empirical c/a-based equation or derived from a point charge model with bond-lengths and angles determined by neutron diffraction.

*Work at MSD at ANL (scattering and analysis) was supported by the U.S. DOE, Office of Science, Materials Sciences and Engineering Division.

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Presenters

  • Omar Chmaissem

    • Physics, Northern Illinois University
    • Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab
    • Materials Science Division, Argonne National Lab
    • Northern Illinois University
    • Northern Illinois Univ

Authors

  • Omar Chmaissem

    • Physics, Northern Illinois University
    • Physics (NIU) and Material Science Division (ANL), Northern Illinois University and Argonne National Lab
    • Materials Science Division, Argonne National Lab
    • Northern Illinois University
    • Northern Illinois Univ

  • Kamal Chapagain

    • Physics, Northern Illinois University

  • Bianca Haberl

    • Neutron Scattering Division, Oak Ridge National Lab

  • Jeffrey Lynn

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

  • Saul Lapidus

    • X-ray Science Division, Advanced Photon Source, Argonne National Lab
    • APS, Argonne National Laboratory

  • Curtis Kenney-Benson

    • HPCAT, X-ray Science Division, Advanced Photon Source, Argonne National Lab
    • Argonne National Laboratory
    • Argonne Natl Lab
    • HPCAT, X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont IL, 60439, USA

  • Bogdan M Dabrowski

    • Institute of Physics, Polish Academy of Sciences
    • Physics, Northern Illinois University

  • Stephan Rosenkranz

    • Materials Science Division, Argonne National Lab
    • Argonne National Laboratory
    • Argonne National Lab
    • Material Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Argonne Natl Lab
    • Material Science, Argonne National Laboratory