Pressure effect on Yb-based strongly correlated electron systems

T. Mito, M. Otani, M. Nakamura, T. Koyama, S. Wada, H. Kotegaway, T. C. Kobayashi, B. Idzikowski, M. Reiffers, J. L. Sarrao

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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 YbInCu 4 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.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalActa Physica Polonica A
Issue number1
Publication statusPublished - Jan 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mito, T., Otani, M., Nakamura, M., Koyama, T., Wada, S., Kotegaway, H., Kobayashi, T. C., Idzikowski, B., Reiffers, M., & Sarrao, J. L. (2009). Pressure effect on Yb-based strongly correlated electron systems. Acta Physica Polonica A, 115(1), 47-52.