Abstract
Perpendicularly magnetized amorphous Pr <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> Fe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">100-x</inf> films were successfully fabricated by r.f. sputtering for <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">30\leq\times\leq60</tex> . The dependence of the Curie temperature T <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</inf> on Pr content is in accordance with that of the melt -spun samples, except for x larger than 50. The change in K <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">u</inf> with temperature of Pr-Fe films is similar to that in Nd-Fe-Co, and there seems to be a transition in anisotropy mode from uniaxial to conical. The dependence of polar Kerr rotation angle θ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">k</inf> on wave length in Pr-Fe and Nd-Fe-Co films suggests a contribution of Nd and Pr to the magneto-optical effect.
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