Hyperfine Interactions

, Volume 7, Issue 1, pp 211–227 | Cite as

TDPAC calculations for mixed SDW and Zeeman hyperfine interactions

Application to theCr−Ta system
  • G. Teisseron
  • P. Peretto
  • J. Berthier
Article

Abstract

The time differential perturbed angular correlation curves have been calculated for the hyperfine field distribution arising from the superposition of an isotropic system of spin density waves and of an external magnetic field. The results of these calculations have been applied to theCr−Ta system. The agreement between the experiments and the calculations is fair. This shows that the spin density waves of chromium are not significantly polarized by a 12 kOe magnetic field. However a large negative shift of the Zeeman interaction is observed in the liquid nitrogen experiment: ΔH/H=−0.18±0.02. The negative sign of the shift shows that the hyperfine field is antiparallel to the local magnetization.

Keywords

Magnetic Field External Magnetic Field Field Distribution Hyperfine Interaction Hyperfine Field 

Résumé

Les courbes de corrélation angulaire différentielle ont été calculées pour une distribution de champs hyperfins résultant de la superposition des interactions d'un noyau avec un système d'ondes de densité de spin d'une part et avec un champ magnétique extérieur d'autre part. Les résultats de ces calculs ont été appliqués à l'alliageCr−Ta. L'accord entre l'expérience et les calculs est bon ce qui montre que les ondes de densité de spin ne sont pas polarisées par un champ magnétique de 12 kOe. Cependant un déplacement de l'interaction de Zeeman de −0.18±0.02 observé à 77 K permet d'affirmér que le champ hyperfin est opposé à l'aimantation locale.

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Copyright information

© North-Holland Publishing Company 1979

Authors and Affiliations

  • G. Teisseron
    • 1
  • P. Peretto
    • 1
  • J. Berthier
    • 1
  1. 1.DRF/Laboratoire d'Interactions HyperfinesCentre d'Etudes Nucléaires de GrenobleGrenoble CedexFrance

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