Nitrogen introduced iron film with low coercive force prepared by ion plating

Abstract

To produce an iron film with excellent magnetic properties, an RF ion-plating technique was used. Ion-plated iron films produced without introducing gas, have a high saturation magnetization(B <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">s</inf> =2.2 T). The effects of introducing gases during iron deposition were also studied. Using a N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -Ar-He mixture gas, an iron film with low coercive force(H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</inf> =1 Oe) was obtained. Although, an iron nitride structure was not observed in this film, 3 at% of nitrogen has been detected in the sample. It is evident that a small amount of nitrogen reduces the coercive force of iron films.