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NMR study of high-Tc superconductors

โœ Scribed by K Asayama; Y Kitaoka; G.-q Zheng; K Ishida; K Magishi


Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
384 KB
Volume
223-224
Category
Article
ISSN
0921-4526

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From systematic measurements of TI, Knight shift, NQR frequency of 63Cu and ~70 with high-pressure measurement in high-Tc materials, La2\_;,SrxCuO4, YBa2Cu307 and T12Ba2CuO6+ e the following results have been obtained. The staggered susceptibility at the zone boundary, X(Q) which is a measure of the

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63'65Cu NMR and NQR studies of YBa2Cu307\_ b are described for compositions, 6, of 0.0, 0.3, and 0.9. Spin-lattice relaxation rates in YBazCu307 reveal significantly different electron dynamics at the two Cu sites in both the normal and superconducting states. In YBa2Cu306.7, the relaxation rates of

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The superconducting property of YBa2(CUl\_xHx)307 {H=Zn and Ni) has been investigated by 63Cu NQR and NMR techniques. In case of Zn(3d I0) doped into CuO 2, the residual spin Knight shift of 63Cu increases appreciably with increasing concentration. Correspondingly,TIT=const. law holds far below Tc,