Magnetic exchange splitting of the Gd(0001) surface state studied by variable-temperature scanning tunneling spectroscopy

被引:44
作者
Bode, M
Getzlaff, M
Heinze, S
Pascal, R
Wiesendanger, R
机构
[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany
[2] Univ Hamburg, Microstruct Res Ctr, D-20355 Hamburg, Germany
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1998年 / 66卷 / Suppl 1期
关键词
D O I
10.1007/s003390051113
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
By means of scanning tunneling spectroscopy, the temperature-dependent exchange splitting of the magnetic d(z)2-like surface state of Gd(0001) films was investigated. The exchange splitting amounts to 700 meV at 20 K and decreases down to 400 meV at 300 K. Above 390 K the splitting remains constant. Pure spin-mixing as well as pure Stoner-like behavior can therefore be excluded. Instead, the observations are explained by a local spin-polarization due to the atomic 4f-moments which competes with spin-mixing caused by the thermal fluctuations of these moments.
引用
收藏
页码:S121 / S124
页数:4
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