Thermodynamics of a Bose Einstein condensate with free magnetization

We study thermodynamic properties of a gas of spin 3 52Cr atoms across Bose Einstein condensation. Magnetization is free, due to dipole-dipole interactions (DDIs). We show that the critical temperature for condensation is lowered at extremely low magnetic fields, when the spin degree of freedom is t...

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Bibliographic Details
Published inarXiv.org
Main Authors Pasquiou, B, Marechal, E, Vernac, L, Gorceix, O, Laburthe-Tolra, B
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.10.2011
Subjects
Condensation
Critical temperature
Depolarization
Dipole interactions
Ferromagnetic phases
Ferromagnetism
Magnetic fields
Magnetic properties
Magnetism
Magnetization
Physics - Quantum Gases
Thermodynamic properties
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Summary:We study thermodynamic properties of a gas of spin 3 52Cr atoms across Bose Einstein condensation. Magnetization is free, due to dipole-dipole interactions (DDIs). We show that the critical temperature for condensation is lowered at extremely low magnetic fields, when the spin degree of freedom is thermally activated. The depolarized gas condenses in only one spin component, unless the magnetic field is set below a critical value, below which a non ferromagnetic phase is favored. Finally we present a spin thermometry efficient even below the degeneracy temperature.
ISSN:2331-8422
DOI:10.48550/arxiv.1110.0786