Magnetic Phase Diagrams of the Dense Kondo Compounds CeB_6 and Ce_<0.5>La_<0.5>B_6

概要

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We have studied the magnetic phase diagrams of the dense Kondo compounds CeB_6 and Ce_<0.5>La_<0.5>B_6 by use of low temperature ultrasonic measurements. A transition associated with a quadrupolar reorientation has clearly been observed around 1kO_e in the antiferroquadrupolar phase II of CeB_6. In the paramagnetic phase I of Ce_<0.5>La_<0.5>B_6 a crossover from the ordinalyΓ_8 ground state to the Kondo singlet state has been found. The field induced transition from the Kondo singlet state to the antiferromagnetic phase III or the phase II has been found at a critical field 17 kO_e. The field angle dependence of the phase diagram of Ce_<0.5>La_<0.5>B_6 is also presented.
社団法人日本物理学会の論文
1995-10-15