XY spin fluid in an external magnetic field

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 fl...

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Veröffentlicht in:	Physical review letters 2005-02, Vol.94 (4), p.045701.1-045701.4
Hauptverfasser:	OMELYAN, I. P, FENZ, W, MRYGLOD, I. M, FOLK, R
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Equations of state, phase equilibria, and phase transitions Exact sciences and technology Liquid-liquid transitions Liquid-vapor transitions Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Physics Specific phase transitions
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Beschreibung
Zusammenfassung:	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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.94.045701