Quasi-two dimensional electronic state of the antiferromagnet UPtGa 5

Shugo Ikeda, Yoshihumi Tokiwa, Yoshinori Haga, Etsuji Yamamoto, Tomoyuki Okubo, Mineko Yamada, Noriko Nakamura, Kiyohiro Sugiyama, Kouichi Kindo, Yoshihiko Inada, Hiroshi Yamagami, Yoshichika Onuki

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We have carried out the de Haas-van Alphen (dHvA) experiment to clarify the Fermi surface property of an antiferromagnet UPtGa5, and have constructed the magnetic phase diagram from the high-field magnetization measurement. From the dHvA experiment, the Fermi surface is found to consist of four kinds of nearly cylindrical Fermi surfaces along the tetragonal [001] direction, which are approximately explained by the result of the spin-polarized energy band calculations based on the antiferromagnetic structure with a sequence of (↑ ↓) along [001]. Relatively large cyclotron masses are detected for carriers of the corresponding Fermi surfaces, ranging from 10 to 24 m0 (m0: rest mass of an electron). 5 f electrons are thus concluded to be itinerant and also to contribute to the magnetic moment at the uranium sites.

Original languageEnglish
Pages (from-to)576-581
Number of pages6
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - Mar 2003
Externally publishedYes


  • Band calculation
  • UPtGa
  • dHvA

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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