Evidence for Power-Law Spin-Correlation Decay from Muon Spin Relaxation in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Ag</mi><mi mathvariant="normal">Mn</mi></math></span> Spin-Glass

D. E. MacLaughlin; L. C. Gupta; D. W. Cooke; R. H. Heffner; M. Leon; M. E. Schillaci

doi:10.1103/PhysRevLett.51.927

Evidence for Power-Law Spin-Correlation Decay from Muon Spin Relaxation in $Ag Mn$ Spin-Glass

D. E. MacLaughlin, L. C. Gupta, D. W. Cooke, R. H. Heffner, M. Leon, and M. E. Schillaci

Phys. Rev. Lett. 51, 927 – Published 5 September 1983

Abstract

Muon spin relaxation measurements have been carried out below the "glass" temperature $T_{g}$ in $Ag Mn$ spin-glasses. The muon spin-lattice relaxation rate varies with field $H$ as $H^{- 0.46 \pm 0.05}$ for $0.30 <~ \frac{T}{T_{g}} <~ 0.66$ . This suggests that impurity-spin correlations decay with time as $t^{- ν}$ , $ν ≃ 0.54 \pm 0.05$ , in contrast to the more usual exponential decay. The present data therefore agree quantitatively with the prediction $ν ≃ \frac{1}{2}$ of mean-field dynamic theories.

Received 14 March 1983

DOI:https://doi.org/10.1103/PhysRevLett.51.927

Authors & Affiliations

D. E. MacLaughlin and L. C. Gupta^*

University of California, Riverside, California 92521

D. W. Cooke^†, R. H. Heffner, M. Leon, and M. E. Schillaci

Los Alamos National Laboratory, Los Alamos, New Mexico 87545

^*Permanent address: Tata Institute of Fundamental Research, Bombay 400 005, India.
^†Permanent address: Memphis State University, Memphis, Tenn. 38152.