dHvA effect study of metamagnetic transition in CeRu2Si 2

Haruyoshi Aoki, Shinya Uji, Ariane Keiko Albessard, Yoshichika Onuki

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47 Citations (Scopus)

Abstract

The de Haas-van Alphen (dHvA) effect measurements have been performed for both the field ranges above and below the metamagnetic transition field (H m) in the (010) plane in CeRu2Si2. The experimental frequencies and effective masses below Hm agree well with the predictions of the first principle or the renormalized band structure calculations based on the itinerant 4f electron model. On the other hand, those above Hm can be explained well by the localized 4f electron model. The one to one correspondence between the dHvA oscillations below and above Hm can be made. The frequencies are found to change abruptly around Hm. The effective masses decrease considerably around Hm and continue to decrease with increasing field. These observations indicate that the 4f electron nature changes from itinerant to localized around H m.

Original languageEnglish
Pages (from-to)3157-3171
Number of pages15
JournalJournal of the Physical Society of Japan
Volume62
Issue number9
Publication statusPublished - 1993 Sep

Keywords

  • CeRuSi
  • De Haas-van Alphen effect
  • Heavy fermion
  • Metamagnetic transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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