title: XY spin fluid in an external magnetic field.
abstract: A method of integral equations is developed to study anisotropic fluids with planar spins in an external field. As a result, the calculations for these systems appear to be no more difficult than those for ordinary homogeneous liquids. The approach proposed is applied to the ferromagnetic XY spin fluid in a magnetic field using a soft mean spherical closure and the Born-Green-Yvon equation. This provides an accurate reproduction of the complicated phase diagram behavior obtained by cumbersome Gibbs ensemble simulation and multiple histogram reweighting techniques.
authors.affiliation: Institute for Condensed Matter Physics, 1 Svientsitskii Street, UA-79011 Lviv, Ukraine.
authors.forename: I P
authors.initials: IP
authors.lastname: Omelyan
authors.forename: W
authors.initials: W
authors.lastname: Fenz
authors.forename: I M
authors.initials: IM
authors.lastname: Mryglod
authors.forename: R
authors.initials: R
authors.lastname: Folk