de Haas-van Alphen Oscillation in Both Normal and Superconducting Mixed States of CeRu2

Masato Hedo; Yoshihiko Inada; Takashi Ishida; Etsuji Yamamoto; Yoshinori Haga; Yoshichika Onuki; Masahiko Higuchi; Akira Hasegawa

doi:10.1143/jpsj.64.4535

de Haas-van Alphen Oscillation in Both Normal and Superconducting Mixed States of CeRu₂

Masato Hedo, Yoshihiko Inada, Takashi Ishida, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki, Masahiko Higuchi, Akira Hasegawa

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Keywords: CeRu₂, superconductor, dHvA, Fermi surface

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1995 Volume 64 Issue 12 Pages 4535-4539

DOI https://doi.org/10.1143/jpsj.64.4535

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Abstract

We have observed the de Haas-van Alphen (dHvA) oscillation in both the normal and superconducting mixed states of CeRu₂. The dHvA amplitude in the mixed state is extremely reduced for the large cyclotron orbit or the carrier with a large cross-sectional area of the Fermi surface compared to the small one. We have detected three dHvA branches, ranging from 6× 10⁵, Oe to 2.3× 10⁷, Oe. The origin of these branches is well explained by the 4f-itinerant band model.

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