The effect of randomness on the quantum spin system Tl1-xK xCuCl3 with x = 0: 44 studied by the zero-field muon-spin-relaxation (ZF-μSR) method

Takao Suzuki, Fumiko Yamada, Isao Watanabe, Takayuki Goto, Akira Oosawa, Hidekazu Tanaka

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Zero-field muon-spin-relaxation (ZF-μSR) measurements were carried out down to 80 mK on the randomness bond system Tl1-xK xCuCl3 with x = 0.44. Time spectra are well fitted by the stretched exponential function exp(-λt)β. The muon spin relaxation rate λ increases rapidly with decreasing temperature, and β tends to 0.5 at 80 mK. The divergent increase of λ suggests the critical slowing down of the frequency of the Cu-3d spin fluctuations toward a spin frozen state below 80 mK, and the root-exponential-like behavior of the time spectrum indicates that the origin of the relaxation is possibly the spatially-fixed fluctuating dilute moments.

Original languageEnglish
Article number074704
JournalJournal of the Physical Society of Japan
Volume76
Issue number7
DOIs
Publication statusPublished - 2007 Jul
Externally publishedYes

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muons
exponential functions
moments
temperature

Keywords

  • μSR
  • Bose glass phase
  • Bose-Einstein condensation
  • Magnon
  • Randomness
  • Spin gap
  • TlKCuCl

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

The effect of randomness on the quantum spin system Tl1-xK xCuCl3 with x = 0 : 44 studied by the zero-field muon-spin-relaxation (ZF-μSR) method. / Suzuki, Takao; Yamada, Fumiko; Watanabe, Isao; Goto, Takayuki; Oosawa, Akira; Tanaka, Hidekazu.

In: Journal of the Physical Society of Japan, Vol. 76, No. 7, 074704, 07.2007.

Research output: Contribution to journalArticle

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