Hyperfine Interactions

, Volume 31, Issue 1–4, pp 455–460 | Cite as

Anisotropic μ+ shift in bismuthshift in bismuth

  • D. Baumann
  • F. N. Gygax
  • E. Lippelt
  • A. Schenck
  • R. Schmid
  • S. Barth
Local Fields at μ+in Solids

Abstract

μSR studies in the semi metal Bi have revealed pronounced anisotropies in the μ+ Knightshift which vary strongly with temperature. Above 10 K the anisotropy is well described by a P2(cosθ) distribution with a change of sign around 60 K. Below 10 K we find a very unusual angular dependence in that the anisotropy is described only by terms of fourth order in the direction cosines. Such a dependence is allowed by symmetry arguments, considering that the pointgroup of the crystalline μ+ site is D3d, but requires that the electrons, responsible for the μ+ Knight shift, are subject to strong spin orbit coupling or involve effective, field induced moments of orbital origin. The various types of anisotropies seem to be associated with the different site occupations of the μ+. The total Knightshift is generally regative which is to be contrasted with the huge positive Knightshift found in the other semimetal Sb /1/.

Keywords

Thin Film Anisotropy Bismuth Fourth Order Angular Dependence 
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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Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1986

Authors and Affiliations

  • D. Baumann
    • 1
  • F. N. Gygax
    • 1
  • E. Lippelt
    • 1
  • A. Schenck
    • 1
  • R. Schmid
    • 1
  • S. Barth
    • 2
  1. 1.Insitut für MittelenergiephysikETH Zürich, c/o SINVilligenSwitzerland
  2. 2.Laboratorium für FestkörperphysikETH ZürichZürichSwitzerland

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