Fabrication of highly spin-polarized Co2FeAl0.5Si0.5 thin-films

Ferromagnetic Heusler Co2FeAl0.5Si0.5 epitaxial thin-films have been fabricated in the L2(1) structure with saturation magnetizations over 1200 emu/cm(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. (C) 2014 Author(s).