11B NMR in the layered diborides OsB2 and RuB2

被引：27

作者：

Suh, B. J. ^{[1
,2
]}

Zong, X. ^{[1
]}

Singh, Y. ^{[1
]}

Niazi, A. ^{[1
]}

Johnston, D. C. ^{[1
]}

机构：

[1] Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA

[2] Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.76.144511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

B-11 nuclear magnetic resonance (NMR) measurements have been performed on B-11 enriched OsB2 and RuB2 polycrystalline powder samples in an external field of 4.7 T and in the temperature range, 4.2 K < T < 300 K. The spectra for both samples show similar quadrupole powder patterns that are typical for a nonaxial symmetry. The Knight shifts K in both samples are very small and constant in temperature. The nuclear spin-lattice relaxation rate T-1(-1) follows a Korringa law in the whole temperature range investigated with T1T=600 and 680 sK for OsB2 and RuB2, respectively. The experimental results indicate that a p character dominates the conduction electron wave function at the B site with a negligibly small s character in both compounds.

引用

页数：4

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