BARIUM NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPIC STUDY OF YBA2CU3O7

被引：13

作者：

SHORE, J ^{[1
]}

YANG, ST ^{[1
]}

HAASE, J ^{[1
]}

SCHWARTZ, D ^{[1
]}

OLDFIELD, E ^{[1
]}

机构：

[1] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.46.595

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured the Ba-135 nuclear magnetic resonance (NMR) line shape and the Ba-137 nuclear quadrupole resonance (NQR) of a powder sample of YBa2Cu3O7, at 300 K, as well as the temperature and field dependences of the Ba-135, Ba-137 NMR line shapes and spin-lattice relaxation rates of magnetically aligned (c parallel-to H-0) samples, in the normal and superconducting states. From the NQR and the field and isotopic dependences of the NMR line shapes of magnetically aligned samples at 300 K, we conclude that the magnetic shift is small (0.0+/-0.12%), and that the principal components of the electric-field gradient tensor are +/- (8.3, -0.2, -8.1)x 10(21) V m-2, with the largest component coincident with the crystallographic c axis. In the superconducting state, the resonances broaden and are shifted to lower frequency. The spin-lattice relaxation behavior is not Korringa-like above T(c), and may be influenced by spin fluctuations in the CuO2 plane.

引用

页码：595 / 598

页数：4

共 33 条

[1] METHODS FOR ANALYZING SPECTROSCOPIC LINE-SHAPES - NMR SOLID POWDER PATTERNS [J].