Magnetic Susceptibility of Multiorbital Systems

Abstract

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.

arXiv comment4 pages, 3 figures

References in corpus (5)

• Triple-q octupolar ordering in NpO_2
• Microscopic theory of multipole ordering in NpO2
• Invariant Form of Hyperfine Interaction with Multipolar Moments - Observation of Octupolar Moments in NpO${}_2$ and CeB${}_6$ by NMR -
• Octupolar ordering of Gamma8 ions in magnetic field
• Multipole ordering in f-electron systems on the basis of a j-j coupling scheme

Cited by in corpus (8)

• Orbital ordering phenomena in $d$- and $f$-electron systems
• Multipole Susceptibility of Multiorbital Anderson Model Coupled with Jahn-Teller Phonons
• Multipole State of Heavy Lanthanide Filled Skutterudites
• Microscopic Aspects of Multipole Properties of Filled Skutterudites
• Multipole Ordering and Fluctuations in f-Electron Systems
• Multipole as $f$-Electron Spin-Charge Density in Filled Skutterudites
• Quadrupole Susceptibility of Gd-Based Filled Skutterudite Compounds
• Microscopic Theory of ${\Gamma }_3$ Quadrupole Ordering in Pr Compounds on the Basis of a $j$-$j$ Coupling Scheme