63/65Cu- NQR Study of impurity-lnduced Magnetic Order in YBa2(Cu1-xMx)3O7 (M = Fe, Co)
Open Access
- 1 April 1990
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 45 (3-4) , 423-428
- https://doi.org/10.1515/zna-1990-3-436
Abstract
We have studied 63/65 Cu NQR at the Cu(l)-chain and Cu(2)-plane site of YBa2(Cu1-x Mx)3O7 (M = Fe, Co). The spin-lattice relaxation rate, T1 -1 , is enhanced at low temperatures and has in the Fe-system a peak at 2 and 4 K for x = 0.005 and 0.015, respectively. Below the peak temperatures the intensity of the Cu-NQR signal decreases rapidly. The results suggest that magnetic ordering of either Fe or Cu moments occurs without destroying the superconductivity below Tc on substituting Cu by magnetic ions.Keywords
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