Slow Spin Dynamics in Non-Fermi-Liquid UCu5−xPdx, x = 1.0 and 1.5

نویسندگان

  • D. E. MacLaughlin
  • R. H. Heffner
چکیده

Low-temperature muon spin-lattice relaxation measurements in the non-Fermiliquid heavy-fermion alloys UCu5−xPdx, x = 1.0 and 1.5, indicate inhomogeneously distributed f -electron spin fluctuation rates, and exhibit a time-field scaling of the muon relaxation function indicative of long-lived spin correlations. In UCu4Pd the scaling exponent γ is small and temperature independent. In UCu3.5Pd1.5 γ varies with temperature, increasing with decreasing temperature similar to spinglass AgMn. This suggests that the spin-glass state found for x & 2 in UCu5−xPdx modifies the low-frequency spin dynamics in UCu3.5Pd1.5.

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تاریخ انتشار 2001