Evolution of Fermi surface properties in CexLa 1-xB6 and PrxLa1-xB6

Motoki Endo, Shintaro Nakamura, Toshiyuki Isshiki, Noriaki Kimura, Tsutomu Nojima, Hayuyoshi Aoki, Hisatomo Harima, Satoru Kunii

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19 Citations (Scopus)

Abstract

We report the de Haas-van Alphen (dHvA) effect measurements of the Fermi surface properties in LaB6, Cex La1-xB 6 (x = 0.1, 0.25, 0.5, 0.75, 1.0) and PrxLa 1-xB6 (x = 0.25, 0.5, 0.75, 1.0) with particular attention to the spin dependence of the Fermi surface properties. The Fermi surface shape and dimension of CexLa1-xB6 change considerably with Ce concentration, while those of PrxLa 1-xB6 change very slightly up to x = 0.75, and in PrB 6 the Fermi surface splits into the up and down spin Fermi surfaces. The effective mass of CexLa1-xB6 increases considerably with Ce concentration and is nearly proportional to the number of Ce ions, whereas that of PrxLa1-xB6 increases slightly with Pr concentration. In CexLa1-xB6 the effective mass depends very strongly on field and increases divergently with decreasing field, while that of PrxLa1-xB6 increases slightly with decreasing field. The contribution to the dHvA signal from the conduction electrons of one spin direction diminishes with Ce concentration and appears to disappear somewhere around x = 0.25-0:5. A weak spin dependence is also found in PrxLa1-xB6. The behaviors of CexLa1-xB6 and Pr xLa1-xB6 are compared to discuss the origin of the spin dependence of the Fermi surface properties.

Original languageEnglish
Article number114704
Journaljournal of the physical society of japan
Volume75
Issue number11
DOIs
Publication statusPublished - 2006 Nov 1

Keywords

  • CeLaB
  • Fermi surface properties
  • PrLa B
  • Spin dependence
  • dHvA effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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