Email this article Uniaxial Quadrupole Order in a Magnet With Strong Biquadratic Exchange
- Authors: Kokorina E.E.1, Medvedev M.V.1
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Affiliations:
- Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
- Issue: Vol 124, No 12 (2023)
- Pages: 1177-1185
- Section: ЭЛЕКТРИЧЕСКИЕ И МАГНИТНЫЕ СВОЙСТВА
- URL: https://journals.rcsi.science/0015-3230/article/view/232727
- DOI: https://doi.org/10.31857/S001532302360154X
- EDN: https://elibrary.ru/CKAKZP
- ID: 232727
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Abstract
Abstract—
It is shown that in a magnet with a sufficiently strong biquadratic exchange interaction (compared to bilinear exchange) and spin S > 1, the temperature transition from a disordered paramagnetic state to the ground ferromagnetic state passes through an intermediate magnetically ordered phase—uniaxial quadrupole ordering. For a magnet with spin S = 3/2, a phase diagram of magnetic states was constructed in the region of large values of the biquadratic exchange and it was studied how the sequence of two phase transitions—“paramagnetic state–quadrupole state” and “quadrupole state–ferromagnetic state”—manifests itself in the temperature behavior of the magnetic heat capacity and the initial magnetic susceptibility.
About the authors
E. E. Kokorina
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: kokorina@iep.uran.ru
Russia, 620016, Ekaterinburg
M. V. Medvedev
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: medvedev@iep.uran.ru
Russia, 620016, Ekaterinburg
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