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本山 岳*; 芳賀 芳範; 山口 明*; 川崎 郁斗*; 住山 昭彦*; 山村 朝雄*
Progress in Nuclear Science and Technology (Internet), 5, p.157 - 160, 2018/11
The crystal structure of the newly discovered compound UTiBi
was determined from single-crystal X-ray diffraction data. This compound shows an antiferromagnetic ordering at 31.5 K. A clear anomaly was observed at the transition temperature on the temperature dependence of magnetic susceptibility and electrical resistivity.
郷地 順*; 住山 昭彦*; 山口 明*; 本山 岳*; 木村 憲彰*; 山本 悦嗣; 芳賀 芳範; 大貫 惇睦
Physical Review B, 93(17), p.174514_1 - 174514_5, 2016/05
被引用回数:1 パーセンタイル:4.82(Materials Science, Multidisciplinary)The Josephson effect between a single crystal UPt and a conventional superconductor Al has been investigated under pressure. A possible change of the superconducting order parameter has been detected at a critical
where the symmetry-breaking antiferromagnetic order disappears. The conclusion is also supported by the different behaviors observed in Josephson current and penetration depth.
郷地 順; 住山 昭彦*; 山口 明*; 本山 岳*; 芳賀 芳範; 大貫 惇睦
Journal of the Physical Society of Japan, 84(9), p.094714_1 - 094714_5, 2015/09
被引用回数:2 パーセンタイル:19.53(Physics, Multidisciplinary)A heavy Fermion compound UBe shows superconductivity below 0.9 K. Earlier study detected an anomaly at 0.7 K deep within the superconducting phase, which was attributed to an additional magnetic phase transition. In this paper, Josephson effect and point-contact spectroscopy have been used to investigate the anomaly in detail. The increase of the Josephson critical current and a continuous drop of the zero-bias conductivity below 0.7 K strongly suggest an enhancement of superconducting order parameter rather than magnetic effects.
郷地 順*; 住山 昭彦*; 山口 明*; 本山 岳*; 木村 憲彰*; 山本 悦嗣; 芳賀 芳範; 大貫 惇睦
JPS Conference Proceedings (Internet), 3, p.011067_1 - 011067_6, 2014/06
The Josephson critical current between a single crystal UPt
and conventional superconductors has been measured under pressure. The observation of
well above the critical pressure 0.25 GPa, together with a Fraunhofer-like pattern in the magnetic field modulation of
indicates that the Josephson effect is allowed in the superconducting state of UPt
.
郷地 順*; 住山 昭彦*; 本山 岳*; 山口 明*; 木村 憲彰*; 山本 悦嗣; 芳賀 芳範; 大貫 惇睦
Journal of the Physical Society of Japan, 81(11), p.113701_1 - 113701_4, 2012/11
被引用回数:6 パーセンタイル:41.95(Physics, Multidisciplinary)The Josephson critical current I between a single-crystal UPt
and Al has been measured for the junctions on the UPt
surface perpendicular to the hexagonal axes. The obtained results contradict the
scenario for the odd-parity order parameter in UPt
, in which the Josephson effect is forbidden in the three directions, whereas the recently proposed
scenario permits, at least, the
- and
-axis Josephson couplings.