NUCLEAR-SPIN-LATTICE RELAXATION-RATE MEASUREMENTS IN YBA2CU3O7

被引：26

作者：

MARTINDALE, JA

BARRETT, SE

DURAND, DJ

OHARA, KE

SLICHTER, CP

LEE, WC

GINSBERG, DM

机构：

[1] Department of Physics, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.50.13645

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental details are given for NMR and NQR measurements of nuclear-spin-lattice relaxation rates for the planar copper and oxygen sites in YBa2Cu3O7. Enrichment of samples with O17, alignment of powder samples, elimination of artifacts in relaxation-rate measurements, and the unusual aspects of weak magnetic-field experiments used to overcome an observed magnetic-field dependence in the rates are described. The role of fluxoids in the magnetic-field dependence of the relaxation rates is discussed. The relaxation rate data are shown to be inconsistent with a spin-singlet, orbital s-wave pairing state with an isotropic energy gap. © 1994 The American Physical Society.

引用

页码：13645 / 13652

页数：8

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