Low‐energy diffuse scattering electron‐spin polarization analyzer
作者:
J. Unguris,
D. T. Pierce,
R. J. Celotta,
期刊:
Review of Scientific Instruments
(AIP Available online 1986)
卷期:
Volume 57,
issue 7
页码: 1314-1323
ISSN:0034-6748
年代: 1986
DOI:10.1063/1.1138595
出版商: AIP
数据来源: AIP
摘要:
A new, compact (approximately fist sized), efficient electron‐spin analyzer is described. It is based on low‐energy (150 eV) diffuse scattering from a high‐Ztarget, for example, an evaporated polycrystalline Au film opaque to the incident electron beam. By collecting a large solid angle of scattered electrons, a figure of meritS2I/I0=10−4is achieved with an analyzing powerS=0.11. The figure of merit degrades only marginally (<10%) for beams with an energy width of 40 eV or after one month of operation at 10−8Torr. The electron optical acceptance is of order 100 mm2 sr eV. The details of the design and construction are discussed and its performance is compared to six other spin analyzers. Illustrative results are presented from an application to scanning electron microscopy with polarization analysis (SEMPA) to image magnetic microstructure.
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