Ballistic hole magnetic microscopy

被引：18

作者：

Haq, E ^{[1
]}

Banerjee, T ^{[1
]}

Siekman, MH ^{[1
]}

Lodder, JC ^{[1
]}

Jansen, R ^{[1
]}

机构：

[1] Univ Twente, Inst Nanotechnol, MESA, NL-7500 AE Enschede, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 08期

关键词：

D O I：

10.1063/1.1864243

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A technique to study nanoscale spin transport of holes is presented: ballistic hole magnetic microscopy. The tip of a scanning tunneling microscope is used to inject hot electrons into a ferromagnetic heterostructure, where inelastic decay creates a distribution of electron-hole pairs. Spin-dependent transmission of the excited hot holes into an underlying p-type semiconductor collector induces a hole current in the valence band of the semiconductor, with magnetocurrent values up to 180%. The spin-filtering of holes is used to obtain local hysteresis loops and magnetic imaging with spatial resolution better than 30 nm. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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