Origin of magnetic contrast in spin-polarized scanning tunneling spectroscopy: Experiments on ultra-thin Mn films

被引：7
作者：
Yamada, TK
Bischoff, MMJ
Heijnen, GMM
Mizoguchi, T
Van Kempen, H [1 ]
机构：
[1] Catholic Univ Nijmegen, NSRIM, NL-6525 ED Nijmegen, Netherlands
[2] Gakushuin Univ, Fac Sci, Tokyo 1718588, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2003年 / 42卷 / 7B期
关键词：
iron; manganese; spin-polarized scanning tunneling microscopy; spin-polarized scanning tunneling spectroscopies; magnetic films; surface magnetism;
D O I：
10.1143/JJAP.42.4688
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Normalized differential tunneling conductivities obtained with Fe-coated W tips show a spin-polarized peak around +0.8 V on ultrathin bet Mn films grown on Fe(001)-whiskers. This spin-polarized peak results in a clear magnetic contrast in spectroscopic images. Our normalization removes the influence of the tunneling probability and makes the spectroscopic curves most reliable for a derivation of the spin-resolved sample density of states (DOS) at positive voltages. From this analysis we conclude that the magnetic contrast in our spectroscopic maps is caused by a highly polarized DOS. Furthermore, a, tip polarization of about 15% is found.
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收藏
页码：4688 / 4691
页数：4
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