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Pressure Induced Changes in the Magnetism of Crystal Field Split Systems

  • Robert P. Guertin

Abstract

Crystalline electric field (CEF) effects in f-band materials are often most dramatically evident in that class of systems where the lowest lying sublevel is a singlet. Although this ground state is necessarily non-magnetic, i.e. <1|Jz|1> = 0, mixing of this state with excited states within the Hund’s rule multiplet is often strong enough to magnetically polarize the ground state, i.e.<1|Jz|1> ≠ 0, where |1’> represents the perturbed ground state1,2. This ground state moment can couple with others, giving rise to magnetic order for the system. Generally, the coupling is weak, and these systems (called induced moment systems) tend to order at rather low temperatures. Accompanying the low ordering temperature is a rather small spontaneous moment. In addition the low temperature magnetization falls far short of the maximum saturated free ion value, even in high magnetic fields. In singlet systems which can develop quadrupole moments through an overcritical admixture of ground and excited states, structural transitions can occur. In addition, for metallic systems, aspherical Coulomb scattering provides an additional avenue for quadrupolar coupling. Ott3 has given a review of these effects, which represent structural analogues to the type of phenomena discussed here.

Keywords

Spin Glass Singlet Ground State Crysta11ine E1ectric Fie1d Spin Glass Transition Pressure Induce Change 
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.
    G.T. Trammell, Phys. Rev. 131, 932 (1963).ADSCrossRefGoogle Scholar
  2. B. Bleaney, Proc. Roy. Soc. A276, 19 (1963).Google Scholar
  3. 2.
    B.R. Cooper and O. Vogt, Phys. Rev. Bl, 1211 (1970).Google Scholar
  4. 3.
    H.R. Ott in “Crystalline Electric Field and Structural Effects in f-Electron Systems”, Ed. J.E. Crow, R.P. Guertin and T. W. Mihalisin, Plenum, New York, 1980. Pp. 9–19.CrossRefGoogle Scholar
  5. 4.
    K.R. Lea, M.J.M. Leask and W.P. Wolf, J. Phys. Chem. Solids 23, 1381 (1962).ADSCrossRefGoogle Scholar
  6. 5.
    K.C. Turberfield, L. Passell, R.J. Birgeneau and E. Bucher, J. Appl. Phys. 42, 1746 (1971).ADSCrossRefGoogle Scholar
  7. R.G. Birgeneau, E. Bucher, J.P. Malta, L. Passell and K.C. Turberfield, Phys. Rev. B8, 5345 (1973).ADSCrossRefGoogle Scholar
  8. 6.
    C. Vettier in Ref. 3. Pp. 23–32.Google Scholar
  9. 7.
    R.P. Guertin, J.E. Crow, L.D. Longinotti, E. Bucher, L. Kupferberg and S. Foner, Phys. Rev. B12, 1005 (1975).ADSCrossRefGoogle Scholar
  10. 8.
    H.T. Weaver and J.E. Schirber, AIP Conf. Proc. 24, 49 (1975).ADSCrossRefGoogle Scholar
  11. 9.
    H.R. Ott and B. Luthi, Phys. Rev. Letters 36, 600 (1976).ADSCrossRefGoogle Scholar
  12. 10.
    C. Vettier, D.B. McWhan, E.J. Blount, and G. Shirane, Phys. Rev. Letters 39, 1028 (1977).ADSCrossRefGoogle Scholar
  13. 11.
    D.B. McWhan, C. Vettier and R. Youngblood, Phys. Rev. B20, 4612 (1979).ADSCrossRefGoogle Scholar
  14. 12.
    R.A.B. Devine in Ref. 3. Pp. 165–171.Google Scholar
  15. 13.
    K. Andres, E. Bucher, S. Darack and J.P. Maita, Phys. Rev. B6, 2716 (1972).ADSCrossRefGoogle Scholar
  16. 14.
    R.P. Guertin, S. Foner, B.R. Cooper and R. Siemann, J. Magn. Magn. Mat. 15–18, 11 (1980).Google Scholar
  17. 15.
    E. Bucher, K. Andres, F.J. diSalvo, J.P. Maita, A.C. Gossard, A.S. Cooper and G.W. Hull, Jr., Phys. Rev. B11, 500 (1975).ADSCrossRefGoogle Scholar
  18. 16.
    R.P. Guertin in “High Pressure and Low Temperature Physics”, Ed. by C.W. Chu and J.W. Woollam, Plenum, New York 1978. Pp. 97–113.CrossRefGoogle Scholar
  19. 17.
    R.J. Birgeneau, J. Als-Nielsen and E. Bucher, Phys. Rev. B6, 2724 (1972).ADSCrossRefGoogle Scholar
  20. 18.
    R.P. Guertin, J.E. Crow, F.P. Missell and S. Foner, Phys. Rev. B17, 2183 (1978).ADSCrossRefGoogle Scholar
  21. 19.
    J.K. Kjems, M. Nielsen, W.J.L. Buyers and J.E. Crow, J. de Physique C5, 132 (1979).Google Scholar
  22. 20.
    S. Jafarey, Y.-L. Wang and K. Rauchwarger, Phys. Rev. B19, 2724 (1979).ADSCrossRefGoogle Scholar
  23. D. Yang and P.A. Lindgard, J. de Physique C5, 134 (1979).Google Scholar
  24. 21.
    E. Bucher, J.P. Maita, G.W. Hull, Jr., and L.D. Longinotti, Z. Physik B25, 41 (1976).Google Scholar
  25. 22.
    J.G. Houmann, B.D. Rainford and B. Luthi, unpublished result cited in Ref. 21.Google Scholar
  26. 23.
    R.P. Guertin and S. Foner, Phys. Letters 68A, 116 (1978).ADSCrossRefGoogle Scholar
  27. 24.
    J. Jensen, J. de Physique C5, 1 (1979).Google Scholar
  28. 25.
    R. Siemann, B.R. Cooper, R.P. Guertin and S. Foner, in Ref. 3. Pp. 457–64.Google Scholar
  29. 26.
    L.E. DeLong, R.P. Guertin and S. Foner, Solid State Commun. 32, 833 (1979).ADSCrossRefGoogle Scholar
  30. 27.
    L.E. DeLong, M.B. Maple, R.W. McCallam, L.D. Woolf, R.N. Shelton and D.C. Johnston, J. Low Temp. Phys. 34, 445 (1979).ADSCrossRefGoogle Scholar
  31. 28.
    M.C. Croft, R.P. Guertin, L.C. Kupferberg and R.D. Parks, Phys. Rev. B20, 2073 (1979).ADSCrossRefGoogle Scholar
  32. B. Barbara, M. Cyrot, C. Lacroix-Lyon-Caen and M.F. Rossignol, J. Phys. Colloq. 40, C5, 340 (1979)Google Scholar
  33. 29.
    P. Lethuillier and J. Chaussy, Phys. Rev. B13, 3132 (1976).ADSCrossRefGoogle Scholar
  34. P.A. Alekseev, I.P. Sadikov, I.A. Markova and O.D. Chistyakov, Physica Status Solidi (b) 86, K59 (1978).ADSCrossRefGoogle Scholar
  35. 30.
    L.E. DeLong in Proc. of the 14th Rare Earth Res. Conf., Fargo, ND, June 1979.Google Scholar
  36. 31.
    S.M. Shapiro, S.K. Hasanain and R.P. Guertin, (to appear).Google Scholar
  37. 32.
    K. Westerholt and S. Methfessel, Physica 86–88B, 1160 (1977).Google Scholar
  38. 33.
    S.K. Hasanain, R.P. Guertin, K. Westerholt, M. Guyot and S. Foner, to be published in Phys. Rev. B.Google Scholar
  39. 34.
    D. Sherrington, J. Phys. C12, L929 (1979).ADSGoogle Scholar
  40. 35.
    C.N. Guy, J. Phys. F: Metal Phys. 7, 1505 (1977). Ibid. 8, 1309 (1978).Google Scholar
  41. 36.
    M. Guyot, S. Foner, S.K. Hasanian, R.P. Guertin and K. Westerholt, Phys. Lett. 79A, 339 (1980).CrossRefGoogle Scholar
  42. 37.
    N. Bontemps, J.C. Rivoal, M. Billardon, J. Rajchenbach and J. Ferré, J. Appl. Phys. 52, 1760 (1981). A.P. Malozemoff and Y. Imry, (to be published).ADSCrossRefGoogle Scholar
  43. 38.
    P. Wachter, E. Kaldis and R. Hauger, Phys. Rev. Letters 40, 1404 (1978).ADSCrossRefGoogle Scholar
  44. 39.
    E.F. Shender, J. Phys. C: Solid State Phys. 9, 1713 (1976).ADSCrossRefGoogle Scholar
  45. 40.
    K. Sugawara, C.Y. Huang and B.R. Cooper, Phys. Rev. B11, 4455 (1975).ADSCrossRefGoogle Scholar
  46. 41.
    P. Bossard, S. Bakanowski, J.E. Crow, T. Mihalisin and W.J.L. Buyers, J. Appl. Phys. 50, 1892 (1979).ADSCrossRefGoogle Scholar
  47. 42.
    J. Wittig, Phys. Rev. Letters 46, 1431 (1981).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Robert P. Guertin
    • 1
  1. 1.Physics DepartmentTufts UniversityMedfordUSA

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