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Unlocking Bloch-type chirality in ultrathin magnets through uniaxial strain

Author

Listed:
  • Gong Chen

    (NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Alpha T. N’Diaye

    (NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory)

  • Sang Pyo Kang

    (Kyung Hee University)

  • Hee Young Kwon

    (Kyung Hee University)

  • Changyeon Won

    (Kyung Hee University)

  • Yizheng Wu

    (State Key Laboratory of Surface Physics and Collaborative Innovation Center of Advanced Microstructures, Fudan University)

  • Z. Q. Qiu

    (University of California at Berkeley)

  • Andreas K. Schmid

    (NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory)

Abstract

Chiral magnetic domain walls are of great interest because lifting the energetic degeneracy of left- and right-handed spin textures in magnetic domain walls enables fast current-driven domain wall propagation. Although two types of magnetic domain walls are known to exist in magnetic thin films, Bloch- and Néel-walls, up to now the stabilization of homochirality was restricted to Néel-type domain walls. Since the driving mechanism of thin-film magnetic chirality, the interfacial Dzyaloshinskii–Moriya interaction, is thought to vanish in Bloch-type walls, homochiral Bloch walls have remained elusive. Here we use real-space imaging of the spin texture in iron/nickel bilayers on tungsten to show that chiral domain walls of mixed Bloch-type and Néel-type can indeed be stabilized by adding uniaxial strain in the presence of interfacial Dzyaloshinskii–Moriya interaction. Our findings introduce Bloch-type chirality as a new spin texture, which may open up new opportunities to design spin–orbitronics devices.

Suggested Citation

  • Gong Chen & Alpha T. N’Diaye & Sang Pyo Kang & Hee Young Kwon & Changyeon Won & Yizheng Wu & Z. Q. Qiu & Andreas K. Schmid, 2015. "Unlocking Bloch-type chirality in ultrathin magnets through uniaxial strain," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7598
    DOI: 10.1038/ncomms7598
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    Cited by:

    1. Sandhya Susarla & Shanglin Hsu & Fernando Gómez-Ortiz & Pablo García-Fernández & Benjamin H. Savitzky & Sujit Das & Piush Behera & Javier Junquera & Peter Ercius & Ramamoorthy Ramesh & Colin Ophus, 2023. "The emergence of three-dimensional chiral domain walls in polar vortices," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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