hysteresis curves; magneto-optical recording materials; mossbauer spectroscopy; alloys; iron; moment
Abstract :
[en] Amorphous thin films of Dy20Fe80-yCoy, with 0 < y < 20 and of ca. 40 nm thickness, have been prepared by sputtering on polyimide substrates. The 295 K conversion electron Mossbauer spectra (CEMS) of these films consist of broadened sextets which have been analyzed with a distribution of hyperfine fields in which the iron moments are oriented perpendicular to the plane of the film, an orientation which is in agreement with the perpendicular magnetic anisotropy observed herein at 295 K by vibrating sample magnetrometry. The average hyperfine field and isomer shift increase linearly with increasing Co content. Both increases arise from an increase in the electron occupation of the 3d states as the cobalt content increases.
Delwiche, Jacques ; Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Grandjean, Fernande ; Université de Liège - ULiège > Département de physique > Département de physique
Vandormael, Denis ; Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Strivay, David ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie - Centre européen en archéométrie
Weber, Georges ; Université de Liège - ULiège > Centre européen en archéométrie - Physique nucléaire, atomique et spectroscopie
Long, G.
Language :
English
Title :
A magnetic and conversion electron Mossbauer spectral study of amorphous Dy20Fe80-yCoy thin films
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