Quadrupolar Phase Diagram and Fermi Surface Properties in the Localized 5f2-Electron System UPd3

Yoshihumi Tokiwa, Kiyohiro Sugiyama, Tetuya Takeuchi, Miho Nakashima, Rikio Settai, Yoshihiko Inada, Yoshinori Haga, Etsuji Yamamoto, Koichi Kindo, Hisatomo Harima, Yoshichika Onuki

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


We measured the electrical resistivity, specific heat, magnetostriction, magnetization and de Haas-van Alphen (dHvA) oscillation in UPd3 with the hexagonal structure in order to clarify the quadrupolar and magnetic properties as well as the nature of conduction electrons. The high-field magnetization measurement at 4.2 K in magnetic fields up to about 50 T reveals two-successive metamagnetic transitions at 10.2 and 17.9 T for the field along the [0001] direction, and one transition at 27.6 T along [112̄0]. From the results of magnetization as well as the magnetostriction measurements at various temperatures, we determined the magnetic phase diagram. Phase boundaries are discussed on the basis of the crystalline electric field scheme of the 5f2 configuration and the quadrupolar interaction of Ozx. Reflecting the localized 5f-electrons, the conduction electrons have small cyclotron effective masses ranging from 0.24 to 3.62 m0, which were determined by the dHvA experiment. The dHvA data are compared to the result of band calculations based on the 5f2-localized band model.

Original languageEnglish
Pages (from-to)1731-1743
Number of pages13
Journaljournal of the physical society of japan
Issue number6
Publication statusPublished - Jun 2001
Externally publishedYes


  • DHvA
  • Fermi surface
  • Magnetization
  • Magnetostriction
  • Quadrupolar ordering
  • UPd

ASJC Scopus subject areas

  • General Physics and Astronomy


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