High-Field Magnetization in Pr-based Filled Skutterudite Compounds PrFe4P12 and PrOs4Sb12

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  • Sugiyama Kiyohiro
    Graduate School of Science, Osaka University Research Center for Materials Science at Extreme Conditions, Osaka University
  • Nakamura Noriko
    Graduate School of Science, Osaka University
  • Yamamoto Takeshi
    Graduate School of Science, Osaka University
  • Honda Daisuke
    Graduate School of Science, Osaka University
  • Aoki Yuji
    Department of Physics, Faculty of Science, Tokyo Metropolitan University
  • Sugawara Hitoshi
    Department of Physics, Faculty of Science, Tokyo Metropolitan University
  • Sato Hideyuki
    Department of Physics, Faculty of Science, Tokyo Metropolitan University
  • Takeuchi Tetsuya
    Low Temperature Center, Osaka University Research Center for Materials Science at Extreme Conditions, Osaka University
  • Settai Rikio
    Graduate School of Science, Osaka University
  • Kindo Koichi
    Research Center for Materials Science at Extreme Conditions, Osaka University
  • Onuki Yoshichika
    Graduate School of Science, Osaka University Advanced Science Research Center, Japan Atomic Energy Research Institute

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  • High-Field Magnetization in Pr-based Filled Skutterudite Compounds PrFe<sub>4</sub>P<sub>12</sub>and PrOs<sub>4</sub>Sb<sub>12</sub>

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High-field magnetization measurements have been performed on the filled skutterudite compounds PrFe4P12 and PrOs4Sb12 with the cubic crystal structure. Magnetization curves along the main symmetry axes of PrFe4P12 show clear anisotropy at high fields. On the basis of this result, we discuss the possible crystalline electric field (CEF) scheme in PrFe4P12 which reproduce the anisotropic feature at high magnetic fields. On the other hand, the magnetization of PrOs4Sb12 for H||⟨100⟩ at 0.1 K shows weak anomalies at 4.5 and 15 T, which correspond to the phase boundaries of the field-induced antiferroquadrupolar ordering phase. The observed magnetization curve is well explained by the CEF scheme determined by the previous neutron scattering experiments.

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