2005/09/30 by Katsunori Kubo, Takashi Hotta
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Bioinformatics #Condensed matter physics #Curie #Curie temperature #Curie's law #Curie–Weiss law #Degeneracy (biology) #Ferromagnetism #Magnetic moment #Magnetic susceptibility #Nuclear Materials and Properties #Paramagnetism #Physics #Radioactive element chemistry and processing #Spin (aerodynamics) #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.75.013702
published as J. Phys. Soc. Jpn. 75, 013702 (2006) · 4 pages, 3 figures
arxiv created 2005/12/26 · openalex publication_date 2006/01/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 t2g and Gamma8 ground states, respectively. As a potential application of our theory, we attempt to explain the difference in the temperature dependence of magnetic susceptibilities of UO2 and NpO2.