A magnetron sputtering system was used to grow Co 2(Cr 1-xFe x)Al Heusler alloy films on thermally oxidized Si substrates at room temperature without any buffer layers. The x-ray diffraction patterns did not show the L2 1 structure as expected for the bulk but revealed the B2 and A2 structures, depending on the Fe concentration x. It was observed that the magnetic moment and the Curie temperature monotonically increased with increasing x. The results show that the maximum tunneling magnetoresistance at room temperature is obtained as 19% for x=0.4.
ASJC Scopus subject areas
- Physics and Astronomy(all)