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

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

2006-09-20

arxiv.org/abs/cond-mat/0609504v1

Physics

Condensed Matter

Materials Science

8 pages, 3 figures; submitted to J. Phys. D: Appl. Phys

Scientific paper

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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