TY - JOUR
T1 - Abrupt Change in Electronic States under Pressure in New Compound EuPt3Al5
AU - Koizumi, Takatsugu
AU - Honda, Fuminori
AU - Sato, Yoshiki J.
AU - Li, Dexin
AU - Aoki, Dai
AU - Haga, Yoshinori
AU - Gouchi, Jun
AU - Nagasaki, Shoko
AU - Uwatoko, Yoshiya
AU - Kaneko, Yoshio
AU - Ōnuki, Yoshichika
N1 - Funding Information:
Acknowledgment One of the authors (Y.O.) thanks Akiko Kikkawa, Yasujiro Taguchi, and Yoshinori Tokura for their support. This work was supported by Grants-in-Aid for Challenging Research (Exploratory) (JP19K21840), Scientific Research (A) (JP19H00646, JP19H00648), and (C) (JP20K03827) from the Japan Society for the Promotion of Science.
Publisher Copyright:
© 2022 The Physical Society of Japan
PY - 2022/4/15
Y1 - 2022/4/15
N2 - 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
AB - 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
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U2 - 10.7566/JPSJ.91.043704
DO - 10.7566/JPSJ.91.043704
M3 - Article
AN - SCOPUS:85126527231
SN - 0031-9015
VL - 91
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 4
M1 - 043704
ER -