Magnetic Susceptibility of Multiorbital Systems

Details Magnetic Susceptibility of Multiorbital Systems Magnetic Susceptibility of Multiorbital Systems

2005-09-30

arxiv.org/abs/cond-mat/0509788v2

J. Phys. Soc. Jpn. 75, 013702 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1143/JPSJ.75.013702

Effects of orbital degeneracy on magnetic susceptibility in paramagnetic phases are investigated within a mean-field theory. Under certain crystalline electric fields, the magnetic moment consists of two independent moments, e.g., spin and orbital moments. In such a case, the magnetic susceptibility is given by the sum of two different Curie-Weiss relations, leading to deviation from the Curie-Weiss law. Such behavior may be observed in d- and f-electron systems with t_{2g} and Gamma_8 ground states, respectively. As a potential application of our theory, we attempt to explain the difference in the temperature dependence of magnetic susceptibilities of UO_2 and NpO_2.

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