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Field-free magnetization reversal by spin-Hall effect and exchange bias

Author

Listed:
  • A. van den Brink

    (Eindhoven University of Technology)

  • G. Vermijs

    (Eindhoven University of Technology)

  • A. Solignac

    (Eindhoven University of Technology
    SPEC, CEA, CNRS, Université Paris-Saclay)

  • J. Koo

    (Eindhoven University of Technology)

  • J. T. Kohlhepp

    (Eindhoven University of Technology)

  • H. J. M. Swagten

    (Eindhoven University of Technology)

  • B. Koopmans

    (Eindhoven University of Technology)

Abstract

As the first magnetic random access memories are finding their way onto the market, an important issue remains to be solved: the current density required to write magnetic bits becomes prohibitively high as bit dimensions are reduced. Recently, spin–orbit torques and the spin-Hall effect in particular have attracted significant interest, as they enable magnetization reversal without high current densities running through the tunnel barrier. For perpendicularly magnetized layers, however, the technological implementation of the spin-Hall effect is hampered by the necessity of an in-plane magnetic field for deterministic switching. Here we interface a thin ferromagnetic layer with an anti-ferromagnetic material. An in-plane exchange bias is created and shown to enable field-free S HE-driven magnetization reversal of a perpendicularly magnetized Pt/Co/IrMn structure. Aside from the potential technological implications, our experiment provides additional insight into the local spin structure at the ferromagnetic/anti-ferromagnetic interface.

Suggested Citation

  • A. van den Brink & G. Vermijs & A. Solignac & J. Koo & J. T. Kohlhepp & H. J. M. Swagten & B. Koopmans, 2016. "Field-free magnetization reversal by spin-Hall effect and exchange bias," Nature Communications, Nature, vol. 7(1), pages 1-6, April.
  • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10854
    DOI: 10.1038/ncomms10854
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    Cited by:

    1. Fen Xue & Shy-Jay Lin & Mingyuan Song & William Hwang & Christoph Klewe & Chien-Min Lee & Emrah Turgut & Padraic Shafer & Arturas Vailionis & Yen-Lin Huang & Wilman Tsai & Xinyu Bao & Shan X. Wang, 2023. "Field-free spin-orbit torque switching assisted by in-plane unconventional spin torque in ultrathin [Pt/Co]N," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Man Yang & Liang Sun & Yulun Zeng & Jun Cheng & Kang He & Xi Yang & Ziqiang Wang & Longqian Yu & Heng Niu & Tongzhou Ji & Gong Chen & Bingfeng Miao & Xiangrong Wang & Haifeng Ding, 2024. "Highly efficient field-free switching of perpendicular yttrium iron garnet with collinear spin current," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    3. Mengxi Wang & Jun Zhou & Xiaoguang Xu & Tanzhao Zhang & Zhiqiang Zhu & Zhixian Guo & Yibo Deng & Ming Yang & Kangkang Meng & Bin He & Jialiang Li & Guoqiang Yu & Tao Zhu & Ang Li & Xiaodong Han & Yong, 2023. "Field-free spin-orbit torque switching via out-of-plane spin-polarization induced by an antiferromagnetic insulator/heavy metal interface," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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