Absence of weak electron localization in ferromagnetic cobalt wires

被引：11
|
作者：
Brands, M [1 ]
Carl, A [1 ]
Dumpich, G [1 ]
机构：
[1] Univ Duisburg Essen, Inst Phys, D-47048 Duisburg, Germany
来源：
EUROPHYSICS LETTERS | 2004年 / 68卷 / 02期
关键词：
D O I：
10.1209/epl/i2004-10191-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the low-temperature resistance behavior and the magnetoresistance of single-domain cobalt wires of 400 mum length, 2 mum width and thicknesses between 5 nm and 32 nm. A logarithmic resistance increase is observed for temperatures T<15 K which is consistently explained as originating from enhanced electron-electron interactions (EEI) in two dimensions rather than from weak electron localization (WEL). The results are confirmed for both platinum-capped and un-capped cobalt wires of various thicknesses. Our experimental results are compared with recent theoretical predictions for 2-dimensional ferromagnetic systems.
引用
收藏
页码：268 / 274
页数：7
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