Tunable Multiferroic Order Parameters in Sr1-xBaxMn1-yTiyO3

Published

August 1, 2019

Author(s)

Kamal Chapagain, Dennis E. Brown, Stanislaw Kolesnik, Saul Lapidus, Bianca Haberl, Jamie Molaison, Chuanlong Lin, Curtis Kenney-Benson, Changyong Park, Jaroslaw Pietosa, Ewa Markiewicz, Bartlomiej Andrzejewski, Jeffrey W. Lynn, Stephan Rosenkranz, Bogdan Dabrowski, Omar Chmaissem

Abstract

Responding to the rapidly increasing demand for efficient energy usage and increased speed and functionality of electronic and spintronic devices, multiferroic oxides have recently emerged as key materials capable of tackling this multifacted challenge. In this paper, we describe the development of unique single-site manganese-based multiferroic perovskite materials with modest amounts of nonmagnetic Ti at the magnetic Mn site in Sr_1-xBa_xMn_1-yO₃ (SBMTO). Significantly enhanced ferroelectric properties were achieved with functional transition temperatures boosted to 430 K. Ferroelectric (FE) distortions with large spontaneous polarization values of 30 υC/cm² like those of the prototypical nonmagnetic BaTiO₃ have been successfully obtained. Temperature dependence of the system's properties was investigated by synchrotron x-ray powder diffraction (XRD) and neutron powder diffraction (NPD) at ambient and high pressures. Various relationships were determined between the structural and magnetic properties, Ba and Ti contents, and T_nN and T_c. Most importantly, our results demonstrate the large coupling between the magnetic and ferroelectric order parameters and the wide tunability of this coupling by slight variations of the material's stoichiometry.

Citation

Physical Review Materials

Volume

3

Issue

8

Pub Type

Journals

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Keywords

Robust Ferroelectric, Antiferromagnet, neutron diffraction, bulk properties, x-ray diffraction, Manganese compound

Citation

Chapagain, K. , Brown, D. , Kolesnik, S. , Lapidus, S. , Haberl, B. , Molaison, J. , Lin, C. , Kenney-Benson, C. , Park, C. , Pietosa, J. , Markiewicz, E. , Andrzejewski, B. , Lynn, J. , Rosenkranz, S. , Dabrowski, B. and Chmaissem, O. (2019), Tunable Multiferroic Order Parameters in Sr_1-xBa_xMn_1-yTi_yO₃, Physical Review Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928183 (Accessed October 6, 2024)