|
This article is cited in 2 scientific papers (total in 2 papers)
Magnetism
Magnetic states of an isotropic magnet with the “large” ion spin $S$ = 3/2
E. V. Orlenko, F. E. Orlenko Peter the Great St. Petersburg Polytechnic University
Abstract:
The magnetic state of a system of particles with a “large” spin of 3/2 in the presence of isotropic exchange interaction in the system has been studied on the basis of a derived spin Hamiltonian. It has been shown that, at a positive contribution of the exchange interaction, an unstable nematic state appears and transforms to a stable ferromagnetic state (with an average spin of 3/2). The excitation spectrum in the ferromagnetic state is a triply degenerate Goldstone-type gapless magnon mode. At a negative sign of the exchange contribution, an antinematic state is stable with respect to a transition to a ferromagnetic state, which is forbidden. In this case, the antinematic always occurs in the state of a phase transition to an unstable antiferromagnetic state, the excitation spectrum of which is characterized by a single nondegenerate Goldstone mode.
Received: 05.10.2015 Revised: 15.01.2016
Citation:
E. V. Orlenko, F. E. Orlenko, “Magnetic states of an isotropic magnet with the “large” ion spin $S$ = 3/2”, Fizika Tverdogo Tela, 58:7 (2016), 1338–1346; Phys. Solid State, 58:7 (2016), 1384–1392
Linking options:
https://www.mathnet.ru/eng/ftt9922 https://www.mathnet.ru/eng/ftt/v58/i7/p1338
|
Statistics & downloads: |
Abstract page: | 31 | Full-text PDF : | 8 |
|