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Field dependence of the muon spin relaxation rate in MnSi.

Authors
  • Gat-Malureanu, I M
  • Fukaya, A
  • Larkin, M I
  • Millis, A J
  • Russo, P L
  • Savici, A T
  • Uemura, Y J
  • Kyriakou, P P
  • Luke, G M
  • Wiebe, C R
  • Sushko, Y V
  • Heffner, R H
  • MacLaughlin, D E
  • Andreica, D
  • Kalvius, G M
Type
Published Article
Journal
Physical review letters
Publication Date
Apr 18, 2003
Volume
90
Issue
15
Pages
157201–157201
Identifiers
PMID: 12732065
Source
Medline
License
Unknown

Abstract

Muon spin rotation/relaxation measurements have been performed in the itinerant helical magnet MnSi at ambient pressure and at 8.3 kbar. We have found the following: (a) the spin-lattice relaxation rate 1/T(1) shows divergence as T1T proportional, variant (T-T(c))(beta) with the power beta larger than 1 near T(c); (b) 1/T(1) is strongly reduced in an applied external field B(L) and the divergent behavior near T(c) is completely suppressed at B(L)> or =4000 G. We discuss that (a) is consistent with the self-consistent renormalization theory and reflects a departure from "mean-field" behavior, while (b) indicates selective suppression of spin fluctuations of the q=0 component by B(L).

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