This epitaxial embodiment of a thin films, which promotes the formation of ferrite fe3o4 and gfe2o3 on the materials special

摘要

A first thin film of appropriate texture, lattice constant, and crystal structure, such as body centered cubic vanadium or chromium with (110) texture is deposited upon a rigid or flexible substrate forming a plurality of polycrystals. A ferrite such as magnetite (Fe.sub. 3 O.sub.4) is sputtered from a target onto the first thin film forming a mixture of . gamma.Fe.sub.2 O.sub.3 and Fe.sub.3 O.sub.4 substantially completely without formation of Fe or other oxides of iron, providing good magnetic characteristics and resistance to corrosion. The substrate temperature can be maintained as low as 200C for both steps when sputtering or evaporation is employed.