The influence of boron and titanium in amorphous magnetic films

Saturation magnetization and magnetostriction, coercivity, thermal stability, and resistivity of amorphous magnetic films of FeTiB and CoTiB have been investigated as a function of boron and titanium content. Films with Fe have large positive magnetostriction; films with Co have small magnetostriction, positive or negative. Their thermal stability is slightly better than that of the transition metal-boron films; corrosion resistant films have, however, lower magnetization. The magnetic properties of polycrystalline FeTi films as a function of titanium content are also reported. In some cases, the addition of boron increases the magnetic moment of the Fe atom.