Positive Muon Knight Shift Measurements in U0.965Th0.035Be13 Single Crystals
J. E. Sonier, R. H. Heffner, D. E. MacLaughlin, G. J. Nieuwenhuys, O. Bernal, R. Movshovich, P. G. Pagliuso, J. Cooley, J. L. Smith, J. D. Thompson
Abstract
Muon spin rotation measurements of the temperature dependence of the Knight shift in single crystals of U0.965Th0.035Be13 have been used to study the static spin susceptibility below the transition temperatures Tc1 and Tc2. While an abrupt reduction of the susceptibility with decreasing temperature is observed below Tc1, the susceptibility does not change below Tc2 and remains at a value below the normal-state susceptibility. In the normal state we find an anomalous anisotropic temperature dependence of the transferred hyperfine coupling between the muon spin and the U 5f-electrons.
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