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論文

Ferromagnetic quantum critical endpoint in UCoAl

青木 大*; Combier, T.*; Taufour, V.*; 松田 達磨; Knebel, G.*; 小手川 恒*; Flouquet, J.*

Journal of the Physical Society of Japan, 80(9), p.094711_1 - 094711_10, 2011/09

 被引用回数:85 パーセンタイル:92.26(Physics, Multidisciplinary)

Resistivity and magnetostriction measurements were performed at high magnetic fields and under pressure on UCoAl. At ambient pressure, the 1st order metamagnetic transition at $$H$$$$rm_m$$ $$sim$$ 0.7T from the paramagnetic ground state to the field-induced ferromagnetic state changes to a crossover at finite temperature $$T$$$$rm_0$$ $$sim$$ 11K. With increasing pressure, $$H$$$$rm_m$$ linearly increases, while $$T$$$$rm_0$$ decreases and is suppressed at the quantum critical endpoint (QCEP). We compare our results on UCoAl with those of UGe$$_2$$ and Sr$$_3$$Ru$$_2$$O$$_7$$.

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