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Anisotropy of exchange interactions and spin reversal in the compensated ferrimagnet Ni4Nb2O9

E. E. Zubov1, I. Fita2, R. Puzniak2, and A. Wisniewski2

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Phys. Rev. B 112, 064424 – Published 14 August, 2025

DOI: https://doi.org/10.1103/xpf2-pw1l

Abstract

Spin reversal and magnetization hysteresis loop were studied in the mean-field approximation for the anisotropic model of the compensated ferrimagnet Ni4Nb2O9. A rigorous analysis was applied to determine the energy of exchange anisotropy in the ab plane. Based on the experimental data on the single crystal [Phys. Rev. B 111, 014420 (2025)], the values of the main parameters of microscopic interactions were obtained. This made it possible to calculate the temperature dependence of magnetization, showing spin reversal, as well as the magnetization hysteresis loop, demonstrating the exchange bias. A good qualitative agreement between the experiment and theory was obtained. The effect of single-ion anisotropy on the magnetism of nickel niobate was analyzed and the importance of the contribution of antiferromagnetic exchange interactions with the second nearest neighbors to the stable ferrimagnetic state of the crystal is presented.

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References (22)

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Phys. Rev. B 112, 064424– Published 14 August, 2025
  • Received 15 May 2025
  • Revised 14 July 2025
  • Accepted 4 August 2025
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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.

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