Abstract
Fe-rich Fe-Cu and Fe-Ag alloy films were sputter-deposited on water-cooled substrates under Ar gas at pressures, P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> , between 1.5 and 80 mTorr. X-ray diffraction, scanning electron micrograph (SEM), Mössbauer effect and magnetization measurements were made on these films. With the increase in P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> , the single bcc phase is extended for Fe-Ag alloys and is almost independent of P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> for Fe-Cu alloys. The alloy films sputter-deposited under low P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> have a fibrous structure in the SEM image and show an in-plane magnetic anisotropy in the Mössbauer spectrum, while those under high P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> have a columnar structure in the SEM image and show a perpendicular magnetic anisotropy in the Mössbauer spectrum. Especially in bcc and fcc mixed Fe-Cu alloys sputter-deposited under high P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Ar</inf> , the magnetization curve perpendicular to the film plane is almost the same as that parallel to the film plane.
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