title: Diamagnetism versus paramagnetism in charged spin-1 Bose gases.
abstract: It has been suggested that either the diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate the magnetic properties of charged spin-1 Bose gases in an external magnetic field, focusing on the competition between the diamagnetism and paramagnetism, using the Lande-factor g of particles to evaluate the strength of the paramagnetic effect. We propose that a gas with g < 1/√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.
authors.affiliation: Department of Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Jian
authors.forename: Jihong
authors.initials: J
authors.lastname: Qin
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gu
mesh_terms: D000465:Algorithms; D004578:Electron Spin Resonance Spectroscopy; D005740:Gases / Q000737:chemistry*; D008280:Magnetics; D013696:Temperature
chemical_list: D005740:Gases