Pressure Effect on Yb-Based Strongly Correlated Electron Systems |
| T. Mito, M. Otani, M. Nakamura, T. Koyama *, S. Wada
Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan |
| H. Kotegawa, T.C. Kobayashi
Graduate School of Sciences, Okayama University, Okayama 700-8530, Japan |
| B. Idzikowski
Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland |
| M. Reiffers
Institute of Experimental Physics, Slovak Academy of Sciences, 043-53 Kosice, Slovakia |
| and J.L. Sarrao
Los Alamos National Laboratory, Mail Stop K764, Los Alamos, New Mexico 87545, USA |
| Full Text PDF |
| We studied pressure effects on YbCu5 and YbInCu4, good examples of the Yb-based compounds to investigate the nonmagnetic-magnetic transition in Yb-based strongly correlated electron systems. With increasing pressure, the low-temperature Fermi liquid state of YbCu5 is gradually suppressed, suggesting the second-order like nonmagnetic-magnetic transition around the pressure of 5-6 GPa. On the other hand, in YbInCu4 which has a pressure-induced magnetic ordered ground state above PC=2.45 GPa, both high-temperature paramagnetic and low-temperature intermediate valence phases are insensitive to pressure. Our results confirm the first-order nature of the transition between the intermediate valence and magnetic ordered phases with pressure. |
| DOI: 10.12693/APhysPolA.115.47 PACS numbers: 71.27.+a, 75.30.Kz, 75.30.Mb, 76.60.-ka |