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Pseudodipolar Interaction and Antiferromagnetism of R2CUO4 Compounds (R=PR,ND, SM and EU)

  • S. V. Maleyev
  • D. Petitgrand
  • Ph. Bourges
  • A. S. Ivanov
Chapter
Part of the NATO Science Series book series (ASHT, volume 55)

Abstract

It is shown that the pseudodipolar interaction allows to explain static and dynamic properties of non-collinear antiferromagnets R2CuO4 in the temperature range above the rare-earth (RE) ordering temperature. Experimental data for inelastic neutron scattering in Pr2CuO4 are presented. Parameters of the pseudodipolar interactions are determined. Comparison of the spin-wave neutron scattering in Pr2CuO4 and Nd2CuO4 reveals a strong dependence of the in-plane anisotropy on the type of the RE ion. The ground-state energy in magnetic field applied parallel to the CuO2 planes is derived and analyzed. In particular it is shown that the spin-flop transition is of second order if the field is applied along the [1,1,0] direction.

Keywords

Inelastic Neutron Spin Configuration Adjacent Plane Optical Branch Spin Reorientation Transition 
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Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • S. V. Maleyev
    • 1
  • D. Petitgrand
    • 2
  • Ph. Bourges
    • 2
  • A. S. Ivanov
    • 3
  1. 1.Petersburg Nuclear Physics InstituteSt.PetersburgRussia
  2. 2.Laboratoire Leon BrillouinCE-SaclayGif-sur-Yvette, CedexFrance
  3. 3.Institute Laue-LangevinGrenoble Cédex 9France

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