Probing depth of the low energy cascade electrons from a transition metal |
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Authors: | M Donath D Scholl H C Siegmann E Kay |
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Institution: | (1) IBM Almaden Research Center, 95120-6099 San Jose, CA, USA;(2) Present address: EURATOM-Association, Max-Planck-Institut für Plasmaphysik, W-8046 Garching bei München, FRG;(3) Present address: Swiss Federal Institute of Technology, CH-8093 Zürich, Switzerland |
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Abstract: | A surface probing depth of only 2 layers for low energy cascade electrons excited with a 3.2 keV primary electron beam is clearly demonstrated by model experiments with non-magnetic overlayers of Ta on magnetic substrates of Fe/Ni80Fe20. This result establishes a short probing depth of low energy electrons in transition metals generalizing the previously observed short magnetic probing depth for spin-polarized electrons in ferromagnets. The short probing depth sheds new light on a number of spectroscopic observations on ferromagnetic transition metals, and has important implications concerning surface magnetic properties and scattering processes of hot electrons in transition metals. |
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Keywords: | 75 30 Pd 79 20 Hx 75 70 Ak |
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