Nuclear magnetic relaxation in Heusler alloys Fe2VGa and Fe2VAl

被引：18

作者：

Ooiwa, K ^{[1
]}

Endo, K ^{[1
]}

机构：

[1] Tokyo Med Coll, Dept Phys, Shinjuku Ku, Tokyo 160, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷

关键词：

Heusler alloys; NMR-relaxation; magnetoresistance-giant; semiconductors;

D O I：

10.1016/S0304-8853(97)00573-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NMR experiments were performed for V-51 and Al-27 in Fe2VGa and Fe2VAl. NMR spectrum of V-51 in Fe2VGa consists of two lines. The Knight shift of V-51 in Fe2VGa is almost zero for the one, and is about +0.6% for the other, and independent of temperature. The temperature dependence of the relaxation rate, 1/T-1, does not follow the Korringa relation. The values of 1/T-1 are less than that of pure Cu by a factor of 100 at 300 K and a factor of 10 at 4.2 K. These results suggest that these alloys are not metallic but are semiconductors with small energy gaps. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：1443 / 1444

页数：2

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