Diamagnetism versus Paramagnetism in charged spin-1 Bose gases

Details Diamagnetism versus Paramagnetism in charged spin-1 Bose gases Diamagnetism versus Paramagnetism in charged spin-1 Bose gases

2010-06-24

arxiv.org/abs/1006.4705v1

J. Phys.: Condens. Matter 23, 026003 (2011)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 5 figures

Scientific paper

It has been suggested that either diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate magnetic properties of charged spin-1 Bose gases in external magnetic field, focusing on the competition between the diamagnetism and paramagnetism, using the Lande-factor $g$ of particles to evaluate the strength of paramagnetic effect. We propose that a gas with $g<{1/\sqrt{8}}$ exhibits diamagnetism at all temperatures, while a gas with $g>{1/2}$ always exhibits paramagnetism. Moreover, a gas with the Lande-factor in between shows a shift from paramagnetism to diamagnetism as the temperature decreases. The paramagnetic and diamagnetic contributions to the total magnetization density are also calculated in order to demonstrate some details of the competition.

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