Uniaxial Quadrupole Order in a Magnet With Strong Biquadratic Exchange

E. E. Kokorina; Кокорина Е. Е.; M. V. Medvedev; Медведев М. В.

doi:10.31857/S001532302360154X

Uniaxial Quadrupole Order in a Magnet With Strong Biquadratic Exchange

Авторлар: Kokorina E.¹, Medvedev M.¹
Мекемелер:
1. Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Шығарылым: Том 124, № 12 (2023)
Беттер: 1177-1185
Бөлім: 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

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат
Рұқсат жабық

Рұқсат берілді
Рұқсат жабық

Тек жазылушылар үшін

Аннотация
Авторлар туралы
Әдебиет тізімі
Қосымша файлдар
Статистика

Аннотация

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.

Негізгі сөздер

biquadratic exchange, uniaxial quadrupole ordering, magnetic heat capacity, initial magnetic susceptibility

Авторлар туралы

E. Kokorina

Institute of Electrophysics, Ural Branch, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: kokorina@iep.uran.ru
Russia, 620016, Ekaterinburg

M. Medvedev

Institute of Electrophysics, Ural Branch, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: medvedev@iep.uran.ru
Russia, 620016, Ekaterinburg

Әдебиет тізімі

Anderson P.W. New approach to the theory of superexchange interactions // Phys. Rev. 1959. V. 115. P. 2−11.
Huang N.L., Orbach R. Biquadratic superexchange // Phys. Rev. Lett. 1964. V. 12. P. 275−277.
Spisak D., Hafner J. Theory of bilinear and biquadratic exchange interactions in iron: bulk and surface // JMMM. 1997. V. 168. P. 257−268.
Kartsev A., Augustin M., Evans R.F.L., Novoselov K.S., Santes E.J.G. Biquadratic exchange interactions in two-dimensional magnets // NPJ: Computational Materials. 2020. 150. 11 p.
Нагаев Э.Л. Магнетики со сложным обменным взаимодействием. М.: Наука. Гл. ред. физ.-мат. лит., 1988. 232 с.
Chen H.H., Levy P.M. Quadrupole phase transitions in magnetic solids // Phys. Rev. Lett. 1971. V. 27. P. 1383.
Chen H.H., Levy P.M. Dipole and quadrupole phase transitions in Spin-1 metals // Phys.Rev. 1973. V. 7. P. 4267−4284.
Кокорина Е.Е., Медведев М.В. Квадрупольное упорядочение и обратный магнитокалорический эффект в магнетике с биквадратичным обменом и спином S = 1 // ФММ. 2022. Т. 123. С. 939−948.
Вальков В.В., Мацулева Г.Н., Овчинников С.Г. Влияние сильного кристаллического поля на спектральные свойства магнетиков с биквадратичным обменом // ФТТ. 1989. Т. 31. Вып. 6. С. 60−67.
Смарт Дж. Эффективное поле в теории магнетизма. М.: Мир, 1968. 272 с.