De haas-van alphen effect studies on the ferromagnetic superconductor UGe2 under high pressure

Taichi Terashima, Takehiko Matsumoto, Chieko Terakura, Shinya Uji, Noriaki Kimura, Motoki Endo, Takemi Komatsubara, Hayuyoshi Aoki, Kunihiko Maezawa

Research output: Contribution to journalArticlepeer-review


We have developed a clamped piston-cylinder high-pressure cell using NiCrAl alloy and have performed de Haas-van Alphen effect measurements on UGe 2 under hydrostatic pressures up to 17.6 kbar, which exceeds the critical pressure Pc where the Curie temperature Tc vanishes. We have found that a discontinuous change of the Fermi surface occurs across Pc. Quasiparticle effective masses are substantially enhanced near 13 kbar, where the Tx anomaly, which occurs below Tc in the ferromagnetic phase, is suppressed. Heavy masses (∼40 me) are observed near Pc on both the ferromagnetic and paramagnetic sides.

Original languageEnglish
Pages (from-to)29-32
Number of pages4
Journaljournal of the physical society of japan
Issue numberSUPPL.
Publication statusPublished - 2002 Dec 1


  • De haas-van alphen effect
  • Fermi surface
  • High pressure
  • UGe

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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