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Relaxation mechanisms for Cu-63,Cu-65 nuclear quadrupole resonance in Zn-doped YBa2Cu3O7

Authors
Park, TKMean, BJLee, KHGo, GSSeo, SWHan, KSLee, MLee, HSKim, HBLee, WC
Issue Date
May-1999
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.59, no.17, pp 11217 - 11220
Pages
4
Journal Title
PHYSICAL REVIEW B
Volume
59
Number
17
Start Page
11217
End Page
11220
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/16844
DOI
10.1103/PhysRevB.59.11217
ISSN
1098-0121
1550-235X
Abstract
We have prepared Zn-doped YBa2Cu3-xZnxO7, x=0 similar to 0.09 and performed Cu-63,Cu-65 nuclear quadrupole resonance measurements for the plane sites at 300 and 100 K as a function of Zn concentration. Both spin lattice and spin-spin relaxation rates are reduced for high Zn concentration. The reduction of spin-lattice relaxation rate due to Zn doping is more significant at the lower temperature. The ratio of Cu-63,Cu-65 spin-lattice relaxation rates indicates that the magnetic contribution to the spin-lattice relaxation rate for the plane copper is reduced whereas the quadrupolar contribution is increased at the lower temperature. This confirms clearly that the antiferromagnetic spin fluctuation of the plane copper moments is suppressed significantly by Zn substitution, [S0163-1829(99)00717-1].
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