Evaluation of sample spin-polarization from spin-polarized scanning tunneling spectroscopy experiments

被引：4
|
作者：
Yamada, TK
de Parga, ALV
Bischoff, MMJ
Mizoguchi, T
Van Kempen, H
机构：
[1] Gakushuin Univ, Fac Sci, Dept Phys, Toshima Ku, Tokyo 1718588, Japan
[2] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands
[3] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain
[4] Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, E-28049 Madrid, Spain
来源：
MICROSCOPY RESEARCH AND TECHNIQUE | 2005年 / 66卷 / 2-3期
关键词：
antiferromagnetic coupling; manganese; iron; screw dislocation; tip magnetization;
D O I：
10.1002/jemt.20149
中图分类号：
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号：
100101 ;
摘要：
Spin-polarized scanning tunneling microscopy has produced a great amount of images presenting magnetic contrast between different magnetic domains with an unsurpassed spatial resolution but getting values like the surface polarization has proven to be a difficult task. We will discuss in detail how to extract this information for the case of manganese layers grown on Fe(001) whiskers. Mn layers adopt a body-centered-tetragonal (bet) structure when they are grown on the Fe(001) surface at room temperature. The Mn layers show an antiferromagnetic coupling between the layers. Comparing our spin-polarized scanning tunneling spectra measured with Fe-coated W tips with spin-resolved band structure calculations, we are able to find the value of the sample surface polarization. Also discussed is a method to change the tip magnetization. Finally, the magnetic structure around a screw dislocation on the surface is reviewed. Microsc. Res. © 2005 Wiley-Liss, Inc.
引用
收藏
页码：93 / 104
页数：12
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