Abstract
Experiments with spin-polarised electrons are rapidly gaining importance due to their ability to selectively measure the exchange-split majority- and minority-spin electronic states. By employing the inverse photoemission process with its small probing depth, information about surface magnetism can additionally be obtained. In this chapter a description will be given of a versatile and transportable spin-polarised electron gun for angle-resolved spin-polarised inverse photoemission spectroscopy (ARSPIPES) experiments. A GaAs(001) single crystal is employed to obtain spin-polarised electrons by photoemission with circularly polarised light. To obtain a transversely polarised beam, which has the objective of optimising the spin-dependent interaction with a sample magnetised in the surface plane, a 90° electrostatic spherical sector is used to deviate the direction but not the spin of the electrons. A set of electrostatic lenses are employed in order to transport and focus the electrons onto a target of investigation. A brief description of results obtained with this apparatus will be given.
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Schedin, F., Warburton, R., Thornton, G. (1995). A Bolt-On Source of Spin Polarised Electrons for Studies of Surface Magnetism. In: Kleinpoppen, H., Newell, W.R. (eds) Polarized Electron/Polarized Photon Physics. Physics of Atoms and Molecules. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1418-7_9
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DOI: https://doi.org/10.1007/978-1-4899-1418-7_9
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