Ferromagnetic Heusler Co[subscript 2]FeAl[subscript 0.5]Si[subscript 0.5] epitaxial thin-films have been fabricated in the L2[subscript 1] structure with saturation magnetizations over 1200 emu/cm[superscript 3]. Andreev reflection measurements show that the spin polarization is as high as 80% in samples sputtered on unheated MgO (100) substrates and annealed at high temperatures. However, the spin polarization is considerably smaller in samples deposited on heated substrates.
Vahidi, M., Gifford, J. A., Zhang, S. K., Krishnamurthy, S., Yu, Z. G., Yu, L., . . . Newman, N. (2014). Fabrication of highly spin-polarized Co2FeAl0.5Si0.5 thin-films. APL Materials, 2(4), 046108. doi:10.1063/1.4869798
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