Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu5 and EuAu5 with the characteristic hexagonal structure

S. Matsuda, J. Ota, K. Nakaima, W. Iha, J. Gouchi, Y. Uwatoko, M. Nakashima, Y. Amako, F. Honda, D. Aoki, A. Nakamura, T. Takeuchi, Y. Haga, H. Harima, M. Hedo, T. Nakama, Y. Ōnuki

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2 Citations (Scopus)


We have succeed in growing single crystals of EuCu (Formula presented.) and EuAu (Formula presented.) with the hexagonal structure by the Bridgman method. Both compounds are known to be ferromagnets with Curie temperatures (Formula presented.) and 13 K, respectively, and the Eu-4f magnetic moments of EuCu (Formula presented.) are known to orient along the hexagonal c-axis or the [0001] direction by the Mössbauer experiment. The magnetisations at 2 K in EuCu (Formula presented.) and EuAu (Formula presented.) in the present experiment saturate at an extremely low field of 2 kOe for (Formula presented.), with a Eu (Formula presented.) -moment of (Formula presented.). On the other hand, the hard-axis magnetisations for (Formula presented.) [0001] saturate at a high field of 40 kOe. It is also found from the electrical resistivty measurement that the electrical resistivities along the current (Formula presented.) [0001] in EuCu (Formula presented.) and EuAu (Formula presented.) are about (Formula presented.) at room temperature, which are compared with the resistivities of (Formula presented.) 30–40 (Formula presented.) for (Formula presented.) [0001]. The quasi-one dimensional conductivities are also characteristic, which were clarified from the de Haas-van Alphen (dHvA) experiment and FLAPW energy band calculation for EuAu (Formula presented.), revealing the existence of a large plate-like Fermi surface.

Original languageEnglish
Pages (from-to)1244-1257
Number of pages14
JournalPhilosophical Magazine
Issue number10
Publication statusPublished - 2020 May 18


  • EuAu
  • EuCu
  • Fermi surfaces
  • Single crystal growth
  • dHvA
  • ferromagnets

ASJC Scopus subject areas

  • Condensed Matter Physics

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