Chiral Surface Twists and Skyrmion Stability in Nanolayers of Cubic Helimagnets

A. O. Leonov, Y. Togawa, T. L. Monchesky, A. N. Bogdanov, J. Kishine, Y. Kousaka, M. Miyagawa, T. Koyama, J. Akimitsu, Ts Koyama, K. Harada, S. Mori, D. McGrouther, R. Lamb, M. Krajnak, S. McVitie, R. L. Stamps, K. Inoue

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Abstract

Theoretical analysis and Lorentz transmission electron microscopy (LTEM) investigations in an FeGe wedge demonstrate that chiral twists arising near the surfaces of noncentrosymmetric ferromagnets [Meynell et al., Phys. Rev. B 90, 014406 (2014)] provide a stabilization mechanism for magnetic Skyrmion lattices and helicoids in cubic helimagnet nanolayers. The magnetic phase diagram obtained for freestanding cubic helimagnet nanolayers shows that magnetization processes differ fundamentally from those in bulk cubic helimagnets and are characterized by the first-order transitions between modulated phases. LTEM investigations exhibit a series of hysteretic transformation processes among the modulated phases, which results in the formation of the multidomain patterns. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Original languageEnglish
Article number087202
JournalPhysical Review Letters
Volume117
Issue number8
DOIs
Publication statusPublished - Aug 15 2016

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Leonov, A. O., Togawa, Y., Monchesky, T. L., Bogdanov, A. N., Kishine, J., Kousaka, Y., Miyagawa, M., Koyama, T., Akimitsu, J., Koyama, T., Harada, K., Mori, S., McGrouther, D., Lamb, R., Krajnak, M., McVitie, S., Stamps, R. L., & Inoue, K. (2016). Chiral Surface Twists and Skyrmion Stability in Nanolayers of Cubic Helimagnets. Physical Review Letters, 117(8), [087202]. https://doi.org/10.1103/PhysRevLett.117.087202