Hot electron spin attenuation lengths of bcc Fe34Co66-Room temperature Magnetocurrent of 1200%

被引：2

作者：

Heindl, E. ^{[1
]}

Kefes, C. ^{[1
]}

Soda, M. ^{[1
]}

Vancea, J. ^{[1
]}

Back, C. H. ^{[1
]}

机构：

[1] Univ Regensburg, Dept Phys, D-93040 Regensburg, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 22期

关键词：

BEMM; MTT; Ballistic transport; VALVE TRANSISTOR; TRANSPORT; BASE;

D O I：

10.1016/j.jmmm.2009.07.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate spin-dependent hot electron transport through metallic epitaxial spin valves by ballistic electron magnetic microscopy (BEMM). By variation of the thickness of one of the ferromagnetic layers we determine the spin dependent attenuation lengths which reflect hot electron transport along the vicinity of the [100]-axis of the bcc Fe34Co66 lattice. The majority spin attenuation length is more than 6 times larger than that of the minority spins within the measured energy interval of 1.3 up to 2 ev above the Fermi level. Consequently a Magnetocurrent effect exceeding 1200% accompanied by a monotonic bias voltage behavior is observed at room temperature. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3693 / 3697

页数：5

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