Abrupt Change in Electronic States under Pressure in New Compound EuPt3Al5

Takatsugu Koizumi, Fuminori Honda, Yoshiki J. Sato, Dexin Li, Dai Aoki, Yoshinori Haga, Jun Gouchi, Shoko Nagasaki, Yoshiya Uwatoko, Yoshio Kaneko, Yoshichika Ōnuki

研究成果: Article査読


We successfully grew single crystals of a new ternary Eu-divalent compound, EuPt3Al5, with an orthorhombic structure (Pnma, #62) using the Bridgman method. EuPt3Al5 orders antiferromagnetically below TN = 12.4 K. TN increases monotonically with increasing pressure up to 8.0 GPa, decreases slightly at 8.5 GPa, and suddenly becomes zero above 9.5 GPa. From the results of low-temperature dependences of electrical and residual resistivities, a sudden disappearance of the antiferromagnetic ordering occurs with a dramatic change in the Eu electronic states from the nearly divalent state to the valence fluctuating state at Pc ≈ 9 GPa. EuPt3Al5 is most likely the second material exhibiting an abrupt valence crossover in Eu compounds after EuCu2Ge2

ジャーナルjournal of the physical society of japan
出版ステータスPublished - 2022 4月 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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