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Magnetic order in RCr\(\mathsf{_{2}}\)Si\(\mathsf{_{2}}\) intermetallics

  • O. Moze
  • M. Hofmann
  • J. M. Cadogan
  • K. H. J. Buschow
  • D. H. Ryan
Article

Abstract.

The magnetic structure and ordering temperatures of three intermetallic compounds which crystallize in the tetragonal ThCr2Si2 structure, TbCr2Si2, HoCr2Si2 and ErCr2Si2, have been determined by neutron diffraction, differential scanning calorimetry and magnetization measurements. The Cr-sublattice orders anti-ferromagnetically with Néel temperatures of 758 K for TbCr2Si2, 718 K for HoCr2Si2 and 692 K for ErCr2Si2. Chromium atoms located at 4d crystallographic sites are aligned anti-parallel along the c-axis, with G Z Cr magnetic modes. In contrast with metallic bcc Cr, the refined room temperature value of the ordered Cr moment is anomalously large for all three compounds. No long range magnetic order of the R sublattice in TbCr2Si2 and HoCr2Si2 is observed, whilst the Er sublattice in ErCr2Si2 orders independently of the Cr sublattice below 2.4 K with moments ferromagnetically aligned in the basal plane.

Keywords

Chromium Differential Scanning Calorimetry Calorimetry Intermetallic Compound Long Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. Szytula, in Handbook of Magnetic Materials, Vol. 6, Elsevier, Amsterdam, edited by K.H.J. Buschow (Elsevier, 1991), pp. 87 -179Google Scholar
  2. 2.
    M. Sikirica, Z. Ban, Acta Cryst. 18, 594 (1965)CrossRefGoogle Scholar
  3. 3.
    Z. Ban, M. Sikirica, Croat. Chem. Acta 36, 151 (1964)Google Scholar
  4. 4.
    Z. Ban, L. Omejec, A. Szytula, Z. Tomkowicz, Phys. Stat. Solidi (a) 27, 333 (1975)Google Scholar
  5. 5.
    M. Hofmann, S.J. Campbell, S.J. Kennedy, X.L. Zhao, J. Magn. Magn. Mater. 176, 279 (1997)CrossRefGoogle Scholar
  6. 6.
    H. Pinto, H. Shaked, Phys. Rev. B 7, 3261 (1973)CrossRefGoogle Scholar
  7. 7.
    A. Dommann, F. Hulliger, Ch. Baerlocher, J. Less-Common Metals 147, 97 (1988)Google Scholar
  8. 8.
    M.W. Dirken, R.C. Thiel, K.H.J. Buschow, J. Less-Common Metals 147, 97 (1989)CrossRefGoogle Scholar
  9. 9.
    R. Coehoorn, K.H.J. Buschow, M.W. Dirken, R.C. Thiel, Phys. Rev. B 42, 4645 (1990)CrossRefGoogle Scholar
  10. 10.
    O. Moze, S. Rosenkranz, R. Osborn, K.H.J. Buschow, J. Appl. Phys. 87, 6283 (2000)CrossRefGoogle Scholar
  11. 11.
    I. Ijjaali, G. Venturini, B. Malaman, J. Alloys and Compounds 279, 102 (1998)CrossRefGoogle Scholar
  12. 12.
    O. Moze, M. Hofmann, K.H.J. Buschow, J. Alloys and Compounds 308, 60 (2000)CrossRefGoogle Scholar
  13. 13.
    H.M. Rietveld, J. Appl. Crystallogr. 2, 65 (1969)CrossRefGoogle Scholar
  14. 14.
    J. Rodriguez-Carvajal, Physica B 192, 5 (1993). The FULLPROF manual and PC version of the FULLPROF refinement program are obtainable from the Laboratoire Leon Brillouin web site, http://www-llb.cea/frGoogle Scholar
  15. 15.
    E.J. Lisher, J.B. Forsyth, Acta Cryst. A 27, 545 (1971)CrossRefGoogle Scholar
  16. 16.
    V.F. Sears, Neutron News 3, 26 (1992)Google Scholar
  17. 17.
    E.F. Bertaut, in Treatise on Magnetism, edited by H. Suhl, G.T. Rado, Vol. III, Chap. 4 (New York Academic Press, 1965), p. 149Google Scholar
  18. 18.
    E.F. Bertaut, Acta Cryst. A 24, 217 (1968)CrossRefGoogle Scholar
  19. 19.
    A.S. Wills, Physica B 276, 680 (2000); program available from ftp://ftp.ill.fr/pub/dif/sarah/CrossRefGoogle Scholar
  20. 20.
    W. Opechowski, R. Guccione, in Treatise on Magnetism, edited by H. Suhl, G.T. Rado, Vol. IIA, Chap. 3 (New York Academic Press, 1965), p. 105Google Scholar
  21. 21.
    A. Szytula, J. Alloys and Compounds 178, 1 (1992)CrossRefGoogle Scholar
  22. 22.
    S. Ishida, S. Asano, J. Ishida, J. Phys. Soc. Jpn 55, 93 (1986)Google Scholar
  23. 23.
    J.S. Smart, in Effective Field Theories of Magnetism (Saunders, Philadelphia, 1966)Google Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • O. Moze
    • 1
  • M. Hofmann
    • 2
  • J. M. Cadogan
    • 3
  • K. H. J. Buschow
    • 4
  • D. H. Ryan
    • 5
  1. 1.INFM, Unitá di Modena, Dipartimento di FisicaUniversitá di Modena e Reggio EmiliaModenaItaly
  2. 2.FRM-IITechnische Universität MünchenGarchingGermany
  3. 3.School of PhysicsUniversity of New South WalesSydneyAustralia
  4. 4.Van der Waals-Zeeman InstituteUniversity of AmsterdamThe Netherlands
  5. 5.The Centre for the Physics of Materials and the Physics DepartmentMcGill UniversityMontreal (Quebec)Canada

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