Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

Z. Q. Liu; 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; R. Ramesh

doi:10.1103/PhysRevLett.116.097203

Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

Z. Q. Liu, 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, R. Ramesh

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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.

Original language	English
Article number	097203
Journal	Physical Review Letters
Volume	116
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.116.097203
State	Published - Mar 3 2016

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title = "Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy",

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.",

author = "Liu, {Z. Q.} and L. Li and Z. Gai and Clarkson, {J. D.} and Hsu, {S. L.} and Wong, {A. T.} and Fan, {L. S.} and Lin, {M. W.} and Rouleau, {C. M.} and Ward, {T. Z.} and Lee, {H. N.} and Sefat, {A. S.} and Christen, {H. M.} and R. Ramesh",

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doi = "10.1103/PhysRevLett.116.097203",

language = "English",

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T1 - Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

AU - Liu, Z. Q.

AU - Li, L.

AU - Gai, Z.

AU - Clarkson, J. D.

AU - Hsu, S. L.

AU - Wong, A. T.

AU - Fan, L. S.

AU - Lin, M. W.

AU - Rouleau, C. M.

AU - Ward, T. Z.

AU - Lee, H. N.

AU - Sefat, A. S.

AU - Christen, H. M.

AU - Ramesh, R.

PY - 2016/3/3

Y1 - 2016/3/3

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AB - 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.

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Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

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