FERRUM: A New Highly Efficient Spin Detector for Electron Spectroscopy

被引：30

作者：

Escher, Matthias ^{[1
]}

Weber, Nils B. ^{[1
]}

Merkel, Michael ^{[1
]}

Plucinski, Lukasz ^{[2
]}

Schneider, Claus M. ^{[2
]}

机构：

[1] FOCUS GmbH, Neukirchner Str 2, D-65510 Hunstetten, Germany

[2] Forschungszentrum Julich, Peter Grunberg Inst PGI 6, D-52428 Julich, Germany

来源：

E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY | 2011年 / 9卷

关键词：

Spin detection; Electron spectroscopy;

D O I：

10.1380/ejssnt.2011.340

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To overcome the restrictions of conventional spin detectors (Mott, SPLEED) low energy electron scattering at a Fe(100)-p(1x1) O surface was first proposed by Bertacco and Ciccacci [Phys. Rev. B 5 9, 4207 (1999)] as a system for highly efficient spin detection. We developed a new instrument based on that scheme. The iron is prepared in - situ on a W(100) crystal without the need for separate sample preparation and exchange when using a MgO substrate. Our working point at 6.5 eV scattering energy is consistent with the above paper by Bertacco and Ciccacci. Results obtained with UPS on an Fe film are shown. With a Sherman-function of approx. 30% and a reflectivity of up to 10% the figure of merit (FOM) is more than one magnitude higher compared to conventional detectors. The FOM shows no degradation over days in UHV.

引用

页码：340 / 343

页数：4

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