Thermodynamic properties of the itinerant-boson ferromagnet

Details Thermodynamic properties of the itinerant-boson ferromagnet Thermodynamic properties of the itinerant-boson ferromagnet

2008-10-07

arxiv.org/abs/0810.1094v1

Phys. Rev. B 78, 134403 (2008)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.78.134403

Thermodynamics of a spin-1 Bose gas with ferromagnetic interactions are investigated via the mean-field theory. It is apparently shown in the specific heat curve that the system undergoes two phase transitions, the ferromagnetic transition and the Bose-Einstein condensation, with the Curie point above the condensation temperature. Above the Curie point, the susceptibility fits the Curie-Weiss law perfectly. At a fixed temperature, the reciprocal susceptibility is also in a good linear relationship with the ferromagnetic interaction.

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