Eur. Phys. J. B 39, 49-54 (2004)
https://doi.org/10.1140/epjb/e2004-00169-x

Non-Heisenberg two-dimensional ferromagnet in an external magnetic field

V.I. Vernadski Tavrida National University, Vernadski pr. 4, Simferopol 95007, Ukraine

Corresponding author: ^a frid@tnu.crimea.ua

Received: 7 June 2003
Revised: 24 November 2003
Published online: 18 June 2004

Abstract

The phase states of a non-Heisenberg two-dimensional ferromagnet are studied, in which the long-range magnetic order is stabilized by the magnetoelastic interaction. It is shown that in this system, together with the phases of nonzero magnetic order, there exists a quadrupolar phase characterized by a tensor order parameter at zero external field. The transition temperature from the quadrupolar phase to the paramagnetic phase is determined.