dHvA Effect Study of Metamagnetic Transition in CeRu2Si2 II - The State above the Metamagnetic Transition

Masahiro Takashita, Haruyoshi Aoki, Taichi Terashima, Shinya Uji, Kunihiko Maezawa, Rikio Settai, Yoshichika Önuki

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86 Citations (Scopus)


We have performed an extensive dHvA effect study of CeRu2Si2 to gain more insight into the nature of the metamagnetic transition. The angular dependence of the dHvA frequencies confirms the transition of the Fermi surfaces from those of the itinerant f electron below the metamagnetic transition field (Hm) to those of the localized f electron above Hm. The field dependence of the frequencies and effective masses are measured for all the frequencies observed with fields parallel to [001]. A waveform analysis suggests that the Fermi surfaces of the up and down spin electrons are similar in size, whereas the effective masses are significantly different. The amplitudes of the dHvA oscillations and their field dependence are anomalous above Hm, implying that the dHvA oscillations above Hm may possibly come from a state which is not well developed near Hm.

Original languageEnglish
Pages (from-to)515-524
Number of pages10
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 1996


  • CeRuSi
  • Heavy fermion compound
  • Metamagnetic transition
  • de Haas-van Alphen effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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