Ce, Yb系重い電子化合物における圧力誘起秩序相の微視的電子状態

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概要

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• The recent progress of high pressure techniques, e.g. a development of nonmagnetic NiCrAl alloy, has enabled us to create pressure over 3 GPa by piston cylinder type pressure cells. Using these new techniques, the nuclear quadrupolar resonance (NQR) and ac-susceptibility (ac-χ) measurements were carried out on strongly correlated electron systems, CeRhIn5 and YbInCu4 under pressure. CeRhIn5 shows pressure-induced phase transition from antiferromagnetic ordering to superconducting states. The present NQR and ac-χ studies revealed a homogeneous coexistence of these two types of orderings near the phase boundaries. Also the ac-χ and NQR investigations on YbInCu4 showing the first-order valence transition at 42 K and at ambient pressure, indicated that ground state of this compound is a ferromagnetically ordered one after the valence transition is suppressed by pressure.

• 日本高圧力学会の論文
• 2003-11-20

著者

• 水戸 毅

  神戸大学理学部物理学科

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