Thermoelectric effects in mesoscopic AuFe spin-glass wires

被引：12

作者：

Neuttiens, G

Eom, J

Strunk, C

Pattyn, H

Van Haesendonck, C

Bruynseraede, Y

Chandrasekhar, V

机构：

[1] Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Heverlee, Belgium

[2] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[3] Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Heverlee, Belgium

[4] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

来源：

EUROPHYSICS LETTERS | 1998年 / 42卷 / 02期

关键词：

D O I：

10.1209/epl/i1998-00228-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recently we reported on the differential resistance R(I) = dV/dI of narrow AuFe spin-glass wires (Phys. Rev. Let., 77 (1996) 2276). Surprisingly, R(I) nas found to be asymmetric in I for the smallest samples. In this letter we present differential resistance measurements performed on a AuFe wire with a multiprobe geometry. The new experiments reveal that the asymmetric behavior of R(I) can be explained in terms of a mesoscopic thermoelectric effect. Our experiments also indicate that the thermopower S of a AuFe spin-glass alloy becomes size dependent for length scales below a few hundred nanometers.

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页码：185 / 190

页数：6

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