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A half-metallic A- and B-site-ordered quadruple perovskite oxide CaCu3Fe2Re2O12 with large magnetization and a high transition temperature

Author

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  • Wei-tin Chen

    (Institute for Chemical Research, Kyoto University
    Present address: Center for Condensed Matter Sciences, National Taiwan University, Roosevelt Road, Taipei 10617, Taiwan)

  • Masaichiro Mizumaki

    (Japan Synchrotron Radiation Research Institute, SPring-8)

  • Hayato Seki

    (Institute for Chemical Research, Kyoto University)

  • Mark S. Senn

    (Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh
    Present address: Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0DE, UK)

  • Takashi Saito

    (Institute for Chemical Research, Kyoto University)

  • Daisuke Kan

    (Institute for Chemical Research, Kyoto University)

  • J. Paul Attfield

    (Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh)

  • Yuichi Shimakawa

    (Institute for Chemical Research, Kyoto University
    Japan Science and Technology Agency, CREST)

Abstract

Strong correlation between spins and conduction electrons is key in spintronic materials and devices. A few ferro- or ferrimagnetic transition metal oxides such as La1−xSrxMnO3, Fe3O4, CrO2 and Sr2FeMoO6 have spin-polarized conduction electrons at room temperature, but it is difficult to find other spin-polarized oxides with high Curie temperatures (well above room temperature) and large magnetizations for spintronics applications. Here we show that an A- and B-site-ordered quadruple perovskite oxide, CaCu3Fe2Re2O12, has spin-polarized conduction electrons and is ferrimagnetic up to 560 K. The couplings between the three magnetic cations lead to the high Curie temperature, a large saturation magnetization of 8.7 μB and a half-metallic electronic structure, in which only minority-spin bands cross the Fermi level, producing highly spin-polarized conduction electrons. Spin polarization is confirmed by an observed low-field magnetoresistance effect in a polycrystalline sample. Optimization of CaCu3Fe2Re2O12 and related quadruple perovskite phases is expected to produce a new family of useful spintronic materials.

Suggested Citation

  • Wei-tin Chen & Masaichiro Mizumaki & Hayato Seki & Mark S. Senn & Takashi Saito & Daisuke Kan & J. Paul Attfield & Yuichi Shimakawa, 2014. "A half-metallic A- and B-site-ordered quadruple perovskite oxide CaCu3Fe2Re2O12 with large magnetization and a high transition temperature," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4909
    DOI: 10.1038/ncomms4909
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