Abstract
StroboscopicμSR and TD-μSR techniques were used to measure theμ + Knight shiftK μ, and relaxation rateλ inSbBi alloys as functions of magnetic fieldH, temperatureT, the angleθ betweenH and the crystallineĉ axis, and the concentration [Bi] of alloyed Bi. In pure Sb and inSbBi (6.5%),K μ (θ=0) andK μ (θ=π/2) both decrease linearly withT up to about 100 K, but bothK μ and its anisotropy are smaller in the 6.5% alloy, indicating a “dilution” effect. With 15 at % Bi,K μ is reduced further but itsT-dependence and that ofλ are dramatically altered. At low temperaturesK μ (θ=0) inSbBi(15%) actually becomes negative and the sign of the anisotropy is reversed. In the same sample,λ is proportional toH at both 20 K and 150 K; at 120 Kλ is proportional toK μ ifθ is used as an implicit variable, but at 36 K this is not the case. A consistent phenomenological description is offered.
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Gygax, F.N., Hintermann, A., Schenck, A. et al. Positive muons in antimony bismuth alloys. Hyperfine Interact 17, 387–391 (1984). https://doi.org/10.1007/BF02065931
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DOI: https://doi.org/10.1007/BF02065931