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Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

Publication Type

Journal Article

Authors

Liu, Z.Q., L. Li, Z. Gai, J.D. Clarkson, S.L. Hsu, A.T. Wong, L.S. Fan, M.-W. Lin, C.M. Rouleau, T.Z. Ward, H.N. Lee, A.S. Sefat, H.M. Christen, Ramamoorthy Ramesh

DOI

10.1103/PhysRevLett.116.097203

Abstract

We report a giant, ∼22%, electroresistance modulation for a metallic alloy above room temperature. It is achieved by a small electric field of 2 kV/cm via piezoelectric strain-mediated magnetoelectric coupling and the resulting magnetic phase transition in epitaxial FeRh/BaTiO3 heterostructures. This work presents detailed experimental evidence for an isothermal magnetic phase transition driven by tetragonality modulation in FeRh thin films, which is in contrast to the large volume expansion in the conventional temperature-driven magnetic phase transition in FeRh. Moreover, all the experimental results in this work illustrate FeRh as a mixed-phase model system well similar to phase-separated colossal magnetoresistance systems with phase instability therein. © 2016 American Physical Society.

Journal

Physical Review Letters

Volume

116

Year of Publication

2016

ISSN

00319007

Notes

cited By 46

Research Areas

Ramesh Lab