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Towards a full Heusler alloy showing room temperature half-metallicity at the surface

M. Cinchetti·J. -P. Wüstenberg·M. Sánchez Albaneda·F. Steeb·A. Conca·M. Jourdan·M. Aeschlimann
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Abstract

In this article we investigate the surface spin polarization in a 100 nm Co2Cr0.6Fe0.4Al (CCFA) film grown ex situ epitaxially on MgO(100) with a 10 nm Fe buffer layer by means of spin resolved photoemission. We show that a careful in situ preparation of the sample surface leads to values for the room temperature spin polarization up to 45% at the Fermi level. To our knowledge, this is the highest value measured so far at the surface region of a full Heusler alloy at room temperature.

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M. Cinchetti, J. -P. Wüstenberg, M. Sánchez Albaneda, F. Steeb, A. Conca, M. Jourdan, M. Aeschlimann. 2006-09-20. Towards a full Heusler alloy showing room temperature half-metallicity at the surface. https://doi.org/10.1088/0022-3727%2F40%2F6%2Fs05

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