STRUCTURAL AND MAGNETIC-PROPERTIES OF NONEQUILIBRIUM FE-TI-AL ALLOYS PRODUCED BY VAPOR QUENCHING

The structural and magnetic properties of nonequilibrium Fe1-y(Ti1-xAl x)y alloys produced by facing-target-type dc sputtering have been inve stigated by X-ray diffraction, magnetization and Mossbauer effect meas urements mainly for y - 0.2 and 0.4. It has been revealed that a singl e bcc phase exists at the Fe-rich corner and the bcc phase is more sta ble on the Al side than the Ti side. An amorphous phase is formed in t he wide concentration region from the center to the Fe-poor side of th e triangle phase diagram. For Fe0.8 (Ti1-xAlx)0.2 alloys, the Curie te mperatures of the amorphous alloys (0.05 < x < 0.35) are much lower th an those of the bcc alloys. It was found that bcc alloys near the phas e boundary to the amorphous phase (x = 0.38) have a fairly small coerc ive force of about 15 Oe. For Fe0.6(Ti1-xAlx)0.4 alloys, the magnetic properties are not so different between the bcc and the amorphous stat e.