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In this work, we uncover long-period incommensurate states characterized by unique multiferroic kinks in corundum nickelate Ni2InSbO6, a member of a promising family of polar magnets. Utilizing a 2-orbital S=1 model, we derive formulas for Heisenberg and anisotropic magnetic exchanges and magnetically-induced polarization, enabling their calculations from first principles. We use these parameters in Monte Carlo and Landau theory-based calculations to reproduce experimentally observed magnetic structures and polarization dependence on the magnetic field. We predict magnetic phase transitions between flat spiral, conical spiral, canted antiferromagnetic and ferromagnetic states under increasing magnetic fields. Kinks in the spiral phases repel each other through a Yukawa-like potential arising from exchange of massive magnons. We also find that suitably directed electric fields can be used to stabilize the ferromagnetic and spiral states.

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• Creative Commons BY Attribution 4.0 International
  

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  The version of record of this article, first published in npj spintronics, is available online at Publisher’s website: http://dx.doi.org/10.1038/s44306-024-00020-9

Keyword: multiferroics, magnetoelectric effect, first-principles calculations, spin model

Date published: 2024-06-03

Publisher: Springer Science and Business Media LLC

Journal:

• npj Spintronics (ISSN: 29482119) vol. 2 issue. 1 p. 17-17 17

Funding:

• Japan Society for the Promotion of Science JP23KJ2165

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s44306-024-00020-9

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Updated at: 2024-08-26 16:30:26 +0900

Published on MDR: 2024-08-26 16:30:26 +0900