Magnetic and Fermi surface properties of the ferromagnetic compound UGa2

Tetsuo Honma, Yoshihiko Inada, Rikio Settai, Shingo Araki, Yoshihumi Tokiwa, Tetsuya Takeuchi, Hitoshi Sugawara, Hideyuki Sato, Keitaro Kuwahara, Makoto Yokoyama, Hiroshi Amitsuka, Toshiro Sakakibara, Etsuji Yamamoto, Yoshinori Haga, Akio Nakamura, Hisatomo Harima, Hiroshi Yamagami, Yoshichika Onuki

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient, thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal structure. The 5f2- and 5f3-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f2- and 5f3-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2m0, which is consistent with the electronic specific heat coefficient of 11 mJ/K2-mol.

Original languageEnglish
Pages (from-to)2647-2659
Number of pages13
Journaljournal of the physical society of japan
Volume69
Issue number8
DOIs
Publication statusPublished - Aug 2000
Externally publishedYes

Keywords

  • De Haas-van Alphen effect
  • Ferromagnet
  • Magnetoresistance
  • UGa

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Honma, T., Inada, Y., Settai, R., Araki, S., Tokiwa, Y., Takeuchi, T., Sugawara, H., Sato, H., Kuwahara, K., Yokoyama, M., Amitsuka, H., Sakakibara, T., Yamamoto, E., Haga, Y., Nakamura, A., Harima, H., Yamagami, H., & Onuki, Y. (2000). Magnetic and Fermi surface properties of the ferromagnetic compound UGa2. journal of the physical society of japan, 69(8), 2647-2659. https://doi.org/10.1143/JPSJ.69.2647