Anomalous Anisotropies in Rare-Earth Magnetic Compounds and Their Behavior under High Magnetic Field

  • T. Kasuya
  • K. Takegahara
  • M. Kasaya
  • Y. Isikawa
  • H. Takahashi
  • T. Sakakibara
  • M. Date
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 24)

Abstract

Recently, the valence fluctuating state in the rare earth compounds is attracting much attention. Among various different characters of valence fluctuation, the dense Kondo-like behavior, which is observed most typically in Ce compounds such as CeAl2, CeAl3 and CeB6, and the strongly correlated narrow band Fermi liquid like behavior, which is observed typically in Sm compounds such as SmB6 and SmS under pressure, are most typical and have been studied in detail [1]. Both of them are common in the sense that the Fermi level is in the conduction bands which are made in most cases by the 5d character on the rare earth atom, and the d-f mixing is particularly important in the former case. In most cases, however, the anions are situated in the nearest neighbour sites of the cation and thus the p-f mixing is much larger than the d-f mixing, where valence bands are formed mostly by the p-character on the anion atom. In this sense, the valence fluctuating states in the materials in which the Fermi levels are in the valence bands or near them are very interesting. Cemonopnictides and Eu-hexaboride, EuB6 are typical examples for such a category and are attracting considerable attention in the recent years. In this paper, we present some experimental results of these two materials focusing on the high field experiment performed recently by our group and draw several new physical pictures by analyzing the data.

Keywords

Anisotropy Boron Reso Ferro CsCl 

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References

  1. 1.
    See, for example, Valence Instabilities and Related Narrow Band Phenomena, ed. R. Parks, Plenum Press, N.Y., 1977, and Jour, de Physique C-5, 1979, Physics of Metallic Rare Earth.Google Scholar
  2. 2.
    J.M. Tarascon, J. Etourneau, P. Dordor, P. Hagenmuller, M. Kasaya and J.M.D. Coey, J. Appl. Phys. 51, 574 (1980).CrossRefADSGoogle Scholar
  3. 3.
    A. Hasegawa and A. Yanase, J. Phys. C 12 5431 (1979).CrossRefADSGoogle Scholar
  4. 4.
    J. Etourneau, R. Naslain and S. La Placa, J. Less Common Metals, 24, 183 (1971).CrossRefGoogle Scholar
  5. 5.
    T. Kasuya, K. Takegahara, M. Kasaya Y. Isikawa and T. Fujita, Magnetic Semiconductors, Jour, de Physique Colloque C5-161 (1980).Google Scholar
  6. 6.
    Y. Takakuwa, S. Suzuki and T. Sagawa, Japan J. Appl. Phys. 17 (Suppl. 17–2) 284 (1978).Google Scholar
  7. 7.
    A. Hasegawa and A. Yanase, Magnetic Semiconductors, Jour, de Physique Colloque C5-377 (1980).Google Scholar
  8. 8.
    M. Kasaya, Y. Isikawa, K. Takegahara and T. Kasuya, Proc. of Intern. Conf. Semiconductors, held at Kyoto, 1980.Google Scholar
  9. 9.
    M. Umehara and T. Kasuya, J. Phys. Soc. Japan 40, 13 (1976).CrossRefADSGoogle Scholar
  10. 10.
    G.L. Olcese, J. Phys. F 9, 569 (1979).CrossRefADSGoogle Scholar
  11. 11.
    G. Güntherodt, E. Kaldis and P. Wachter, Solid State Commun. 15, 1435 (1974).CrossRefGoogle Scholar
  12. 12.
    A. Hasegawa, J. Phys. C (in press).Google Scholar
  13. 13.
    R.J. Birgeneau, E. Bucher, J.P. Maita, L. Passell and K.C. Turberfield, Phys. Rev. B8, 5345 (1973).CrossRefADSGoogle Scholar
  14. 14.
    R. Hanger, E. Kaldis, G. von Schulthess, P. Wachter and Ch. Zürcher, J. Mag. Mag. Mat. 3, 103 (1976).CrossRefADSGoogle Scholar
  15. 15.
    H. Heer, A. Furrer, W. Hälg and O. Vogt, J. Phys. C 12, 5207 (1979).CrossRefADSGoogle Scholar
  16. 16.
    J.X. Boucherie, A. Delapalme, C.J. Howard, J. Rossat-Mignod and O. Vogt, Proc. of Intern. Symp. on Physics of Actinides and Related 4f Materials, held at Zürich, 1980.Google Scholar
  17. 17.
    J. Rossat-Mignod, P. Burlet, J. Villain, II. Bartholin, Wang Tcheng-Si, D. Florence and O. Vogt, Phys. Rev. B 16, 440 (1977).CrossRefADSGoogle Scholar
  18. 18.
    K. Takegahara, A. Yanase and T. Kasuya, Magnetic Semiconductors, Jour. de Physique Colloque C5–327 (1980), K. Takegahara, H. Takahashi, A. Yanase and T. Kasuya, to be submitted to J. Phys. C.Google Scholar
  19. 19.
    B.R. Cooper and O. Vogt, Jour, de Physique 32, Cl–1026 (1971).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1981

Authors and Affiliations

  • T. Kasuya
    • 1
  • K. Takegahara
    • 1
  • M. Kasaya
    • 1
  • Y. Isikawa
    • 1
  • H. Takahashi
    • 1
  • T. Sakakibara
    • 2
  • M. Date
    • 2
  1. 1.Department of PhysicsTohoku UniversitySendaiJapan
  2. 2.Department of PhysicsOsaka UniversityOsakaJapan

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