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Large resistivity modulation in mixed-phase metallic systems

Author

Listed:
  • Yeonbae Lee

    (University of California)

  • Z. Q. Liu

    (Oak Ridge National Laboratory, Center for Nanophase Materials Sciences)

  • J. T. Heron

    (Cornell University)

  • J. D. Clarkson

    (University of California)

  • J. Hong

    (University of California)

  • C. Ko

    (University of California)

  • M. D. Biegalski

    (Oak Ridge National Laboratory, Center for Nanophase Materials Sciences)

  • U. Aschauer

    (Materials Theory, ETH Zurich)

  • S. L. Hsu

    (University of California)

  • M. E. Nowakowski

    (University of California)

  • J. Wu

    (University of California
    Lawrence Berkeley National Laboratory)

  • H. M. Christen

    (Oak Ridge National Laboratory, Center for Nanophase Materials Sciences)

  • S. Salahuddin

    (University of California)

  • J. B. Bokor

    (University of California
    Lawrence Berkeley National Laboratory)

  • N. A. Spaldin

    (Materials Theory, ETH Zurich)

  • D. G. Schlom

    (Cornell University
    Kavli Institute at Cornell for Nanoscale Science)

  • R. Ramesh

    (University of California
    Lawrence Berkeley National Laboratory
    University of California
    Oak Ridge National Laboratory)

Abstract

In numerous systems, giant physical responses have been discovered when two phases coexist; for example, near a phase transition. An intermetallic FeRh system undergoes a first-order antiferromagnetic to ferromagnetic transition above room temperature and shows two-phase coexistence near the transition. Here we have investigated the effect of an electric field to FeRh/PMN-PT heterostructures and report 8% change in the electrical resistivity of FeRh films. Such a ‘giant’ electroresistance (GER) response is striking in metallic systems, in which external electric fields are screened, and thus only weakly influence the carrier concentrations and mobilities. We show that our FeRh films comprise coexisting ferromagnetic and antiferromagnetic phases with different resistivities and the origin of the GER effect is the strain-mediated change in their relative proportions. The observed behaviour is reminiscent of colossal magnetoresistance in perovskite manganites and illustrates the role of mixed-phase coexistence in achieving large changes in physical properties with low-energy external perturbation.

Suggested Citation

  • Yeonbae Lee & Z. Q. Liu & J. T. Heron & J. D. Clarkson & J. Hong & C. Ko & M. D. Biegalski & U. Aschauer & S. L. Hsu & M. E. Nowakowski & J. Wu & H. M. Christen & S. Salahuddin & J. B. Bokor & N. A. S, 2015. "Large resistivity modulation in mixed-phase metallic systems," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms6959
    DOI: 10.1038/ncomms6959
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    Cited by:

    1. Han Yan & Hongye Mao & Peixin Qin & Jinhua Wang & Haidong Liang & Xiaorong Zhou & Xiaoning Wang & Hongyu Chen & Ziang Meng & Li Liu & Guojian Zhao & Zhiyuan Duan & Zengwei Zhu & Bin Fang & Zhongming Z, 2024. "An antiferromagnetic spin phase change memory," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Minguk Jo & Ye-Won Seo & Hyojin Yoon & Yeon-Seo Nam & Si-Young Choi & Byung Joon Choi & Junwoo Son, 2022. "Embedded metallic nanoparticles facilitate metastability of switchable metallic domains in Mott threshold switches," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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