63Cu NQR/NMR Study of Zn-Substituted YBa2Cu408 -Effect of Impurity on Spin-Gap-Like Behavior-

Guo Qing Zheng, Takahiro Odaguchi, Yasuharu Kodama

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The nuclear-spin-lattice relaxation rate, 1/Tu and the Knight shift, Kab, of 63Cu in the plane have been measured for YBa2(Cu1-xZnJC)408 (x=0.01 and 0.02) in order to unravel the underlying problem of spin dynamics in YBa2Cu408. It was found that the substitution of Zn into the Cu02 plane causes a continuous increase of 1/TXT down to Tc in contrast to the marked reduction of l/T{Tat far above Tc for the undoped sample, while the Knight shift is invariant. These findings show that the suppression of the spin fluctuation spectral weight around Q=(n, n) at low energies is removed by substituting Zn into the Cu02 plane, while that around q-{0, 0) is not affected appreciably. The ^-dependent change of spin-fluctuations with Zn-doping may be crucial in elucidating the cause of the decrease of 63(l/7,1r) above Tc.

Original languageEnglish
Pages (from-to)2591-2594
Number of pages4
Journaljournal of the physical society of japan
Volume62
Issue number8
DOIs
Publication statusPublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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