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Metamagnetic transition of itinerant ferromagnet U$$_3$$P$$_4$$ under high pressure

遍歴強磁性体U$$_3$$P$$_4$$の高圧下メタ磁性転移

荒木 新吾*; 林田 みなみ*; 西海 尚人*; 眞鍋 博紀*; 池田 陽一*; 小林 達生*; 村田 惠三*; 稲田 佳彦*; Wi$'s$niewski, P.*; 青木 大*; 大貫 惇睦; 山本 悦嗣; 芳賀 芳範

Araki, Shingo*; Hayashida, Minami*; Nishiumi, Naoto*; Manabe, Hiroki*; Ikeda, Yoichi*; Kobayashi, Tatsuo*; Murata, Keizo*; Inada, Yoshihiko*; Wi$'s$niewski, P.*; Aoki, Dai*; Onuki, Yoshichika; Yamamoto, Etsuji; Haga, Yoshinori

Hall effect measurements in ferromagnet U$$_3$$P$$_4$$ were carried out under pressure up to 4.3 GPa. The Hall resistivity at paramagnetic state is dominated by the extraordinary Hall effect due to the skew scattering. The Curie temperature decreases with increasing pressure and disappears at Pc = 4.1 GPa. The clear first-order metamagnetic transition from the paramagnetic state to the strongly ferromagnetic state appears around Pc at low temperature.

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