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Weather Resistance of CoCr Film

Cr content was varied in fabricating samples of CoCr-Permalloy films to investigate magnetic characteristics on the surface and inside the films under two sets of fixed environmental conditions to assess weather resistance. The interior of the films were found to be stable with no change in magnetic properties. On the surface, changes in Hcs value and in the composition were found. Though samples containing more than 20 at% Cr showed excellent stability.