Electronic phase diagram of itinerant electron metamagnet UCoAl

遍歴メタ磁性体UCoAlの電子相図

前田 瑞穂*; 松田 達磨*; 芳賀 芳範   ; 白崎 謙次*; 木村 憲彰*

Maeda, Mizuho*; Matsuda, Tatsuma*; Haga, Yoshinori; Shirasaki, Kenji*; Kimura, Noriaki*

We investigate the pressure dependence of the magnetoresistivity and Hall resistivity for an itinerant-electron metamagnet UCoAl. The first-order metamagnetic transition point varies as a function of hydrostatic pressure and terminates at the critical pressure 2.0 GPa. The electronic system, however, does not show criticality at this pressure but extends to higher pressures, unlike the usual quantum critical behavior.