Magnetic and Fermi Surface Properties in PrRh_3B_2(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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We have grown a single crystal of PrRh_3B_2 with the hexagonal structure and measured the electrical resistivity, specific heat, de Haas-van Alphen oscillation, magnetic susceptibility, high-field magnetization, thermal expansion and magnetostriction. PrRh_3B_2 is not a simple ferromagnet as reported previously, but a ferrimagnet with an ordering temperature T_<ord> = 3.6K. The Schottky specific heat observed around 25 K and the large anisotropy of the magnetic susceptibility and magnetization are found to be well explained by the crystalline electric field (CEF) with a large overall CEF-splitting energy of 1080K and a strong ferromagnetic exchange interaction along the [0001] direction. The topology of the Fermi surface in PrRh_3B_2 is similar to that of the non-4f reference compound LaRh_3B_2, exhibiting a quasi-one-dimensional character of the electronic states.
社団法人日本物理学会の論文
2004-08-15