TEMPERATURE-DEPENDENT ANISOTROPY OF CU(2) NUCLEAR-RELAXATION RATE IN YBA2CU3O7 BELOW TC

被引：85

作者：

TAKIGAWA, M ^{[1
]}

SMITH, JL ^{[1
]}

HULTS, WL ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.44.7764

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the anisotropy of the Cu(2) nuclear-spin-lattice relaxation rate in the superconducting state of YBa2Cu3O7 in a small magnetic field (0.44 T) and the temperature range 30-210 K. The anisotropy is almost temperature independent in the normal state but develops a nonmonotonic temperature dependence below T(c) with a minimum near 70-80 K. The isotopic ratio of the relaxation rates shows that the nuclear relaxation is due to magnetic processes in this temperature range, although an extrinsic quadrupolar relaxation process appears below 30 K.

引用

页码：7764 / 7767

页数：4

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