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Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3

Author

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  • R. Lebrun

    (Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay
    Johannes Gutenberg-Universität Mainz)

  • A. Ross

    (Johannes Gutenberg-Universität Mainz
    Graduate School of Excellence Materials Science in Mainz (MAINZ))

  • O. Gomonay

    (Johannes Gutenberg-Universität Mainz)

  • V. Baltz

    (Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, SPINTEC)

  • U. Ebels

    (Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, SPINTEC)

  • A.-L. Barra

    (Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL)

  • A. Qaiumzadeh

    (Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology)

  • A. Brataas

    (Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology)

  • J. Sinova

    (Johannes Gutenberg-Universität Mainz
    Institute of Physics ASCR, v.v.i.)

  • M. Kläui

    (Johannes Gutenberg-Universität Mainz
    Graduate School of Excellence Materials Science in Mainz (MAINZ)
    Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology)

Abstract

Antiferromagnetic materials can host spin-waves with polarizations ranging from circular to linear depending on their magnetic anisotropies. Until now, only easy-axis anisotropy antiferromagnets with circularly polarized spin-waves were reported to carry spin-information over long distances of micrometers. In this article, we report long-distance spin-transport in the easy-plane canted antiferromagnetic phase of hematite and at room temperature, where the linearly polarized magnons are not intuitively expected to carry spin. We demonstrate that the spin-transport signal decreases continuously through the easy-axis to easy-plane Morin transition, and persists in the easy-plane phase through current induced pairs of linearly polarized magnons with dephasing lengths in the micrometer range. We explain the long transport distance as a result of the low magnetic damping, which we measure to be ≤ 10−5 as in the best ferromagnets. All of this together demonstrates that long-distance transport can be achieved across a range of anisotropies and temperatures, up to room temperature, highlighting the promising potential of this insulating antiferromagnet for magnon-based devices.

Suggested Citation

  • R. Lebrun & A. Ross & O. Gomonay & V. Baltz & U. Ebels & A.-L. Barra & A. Qaiumzadeh & A. Brataas & J. Sinova & M. Kläui, 2020. "Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-20155-7
    DOI: 10.1038/s41467-020-20155-7
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    Cited by:

    1. Shubhankar Das & A. Ross & X. X. Ma & S. Becker & C. Schmitt & F. Duijn & E. F. Galindez-Ruales & F. Fuhrmann & M.-A. Syskaki & U. Ebels & V. Baltz & A.-L. Barra & H. Y. Chen & G. Jakob & S. X. Cao & , 2022. "Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO3," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Yongjian Zhou & Liyang Liao & Tingwen Guo & Hua Bai & Mingkun Zhao & Caihua Wan & Lin Huang & Lei Han & Leilei Qiao & Yunfeng You & Chong Chen & Ruyi Chen & Zhiyuan Zhou & Xiufeng Han & Feng Pan & Che, 2022. "Orthogonal interlayer coupling in an all-antiferromagnetic junction," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. Shannon C. Haley & Eran Maniv & Shan Wu & Tessa Cookmeyer & Susana Torres-Londono & Meera Aravinth & Nikola Maksimovic & Joel Moore & Robert J. Birgeneau & James G. Analytis, 2023. "Long-range, non-local switching of spin textures in a frustrated antiferromagnet," Nature Communications, Nature, vol. 14(1), pages 1-6, December.

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