Field Dependence of the Muon Spin Relaxation Rate in MnSi Academic Article uri icon

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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).

authors

  • Gat-Malureanu, IM
  • Fukaya, A
  • Larkin, MI
  • Millis, AJ
  • Russo, PL
  • Savici, AT
  • Uemura, YJ
  • Kyriakou, PP
  • Luke, Graeme
  • Wiebe, Christopher
  • Sushko, YV
  • Heffner, RH
  • MacLaughlin, DE
  • Andreica, D
  • Kalvius, GM

publication date

  • April 18, 2003