• Open Access

Antiferromagnetism Emerging in a Ferromagnet with Gain

Huanhuan Yang, C. Wang, Tianlin Yu, Yunshan Cao, and Peng Yan
Phys. Rev. Lett. 121, 197201 – Published 5 November 2018

Abstract

We present a theoretical mapping to show that a ferromagnet with gain (loss) is equivalent to an antiferromagnet with an equal amount of loss (gain). Our findings indicate a novel first-order ferromagnet-antiferromagnet phase transition by tuning the gain-loss parameter. As an appealing application, we demonstrate the realization as well as the manipulation of the antiferromagnetic Skyrmion, a stable topological quasiparticle not yet observed experimentally, in a chiral ferromagnetic thin film with gain. We also consider ferromagnetic bilayers with balanced gain and loss and show that the antiferromagnetic Skyrmion can be found only in cases with a broken parity-time symmetry phase. Our results pave the way for investigating the emerging antiferromagnetic spintronics and parity-time symmetric magnonics in ferromagnets.

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  • Received 3 July 2018
  • Revised 28 August 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.197201

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Huanhuan Yang, C. Wang, Tianlin Yu, Yunshan Cao*, and Peng Yan

  • School of Electronic Science and Engineering and State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

  • *yunshan.cao@uestc.edu.cn
  • yan@uestc.edu.cn

Article Text

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Issue

Vol. 121, Iss. 19 — 9 November 2018

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