2003 Volume 72 Issue 5 Pages 1002-1005
Neutron diffraction experiments on the heavy-fermion superconductor PrOs4Sb12 revealed that a small antiferromagnetic moment, parallel to [010] (y-direction), is induced in the field-induced phase (H||z). The analysis, based on the Γ1 singlet ground state crystal field model, shows that antiferro-order of Oyz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs4Sb12 is the Γ1 singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.
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Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
Tokyo Sugaku-Butsurigakkwai Hokoku
Tokyo Sugaku-Butsurigaku Kwai Kiji
