TY - JOUR
T1 - 63Cu NQR/NMR Study of Zn-Substituted YBa2Cu408 -Effect of Impurity on Spin-Gap-Like Behavior-
AU - Zheng, Guo Qing
AU - Odaguchi, Takahiro
AU - Kodama, Yasuharu
PY - 1993
Y1 - 1993
N2 - 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.
AB - 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.
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U2 - 10.1143/JPSJ.62.2591
DO - 10.1143/JPSJ.62.2591
M3 - Article
AN - SCOPUS:17044438644
SN - 0031-9015
VL - 62
SP - 2591
EP - 2594
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 8
ER -