Development of a spin polarized low energy electron diffraction system

A V Pradeep; Arnab Roy; P S Anil Kumar; J Kirschner

doi:10.1063/1.4941682

Development of a spin polarized low energy electron diffraction system

Rev Sci Instrum. 2016 Feb;87(2):023906. doi: 10.1063/1.4941682.

Authors

A V Pradeep¹, Arnab Roy¹, P S Anil Kumar¹, J Kirschner²

Affiliations

¹ Department of Physics, Indian Institute of Science, Bangalore 560012, India.
² Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale), Germany.

PMID: 26931865
DOI: 10.1063/1.4941682

Abstract

We have designed and constructed a spin polarized low energy electron diffraction system working in the reflected electron pulse counting mode. This system is capable of measuring asymmetries due to spin-orbit and exchange interactions. Photoemission from a strained GaAs/GaAsP super lattice is used as the source of spin polarized electrons. Spin-orbit asymmetry is evaluated for Ir(100) single crystal at various energies. Subsequently, exchange asymmetry has been evaluated on 40 monolayer Fe deposited on Ir(100). This instrument proves to be useful in understanding structure and magnetism at surfaces.