Title :
Magnetic properties and structures of CoCrTa films for wide range of Cr variation
Author :
Hwang, C.H. ; Park, Y.S. ; Jang, P.W. ; Lee, T.D.
Author_Institution :
Dept. of Metall. Eng., Yonsei Univ., Seoul, South Korea
fDate :
11/1/1993 12:00:00 AM
Abstract :
The authors studied the effects of Ta addition on magnetic properties of CoCrTa films for a wider range of 13-21 at.% Cr and tried to elucidate how Ta addition increases the coercivity. Ta addition is effective in increasing perpendicular coercivity in the films with Cr content lower than 17 at.% Cr region and is not effective in those with higher than 19 at.% Cr region. The higher coercivity of the CoCrTa films is interpreted as the enhanced Cr segregation behavior due to the difference of chemical affinity among the atoms. However, the lower coercivity of the films with large amounts of Ta is attributed to the formation of the amorphous-like structure
Keywords :
X-ray diffraction examination of materials; alloying additions; chromium alloys; cobalt alloys; coercive force; ferromagnetic properties of substances; grain size; magnetic thin films; segregation; sputtered coatings; tantalum alloys; transmission electron microscope examination of materials; CoCrTa films; TEM; XRD; addition effects; amorphous-like structure; coercivity; composition; difference of chemical affinity; film structure; grain size; magnetic properties; magnetic thin films; segregation behavior; sputtered films; Amorphous magnetic materials; Annealing; Chromium; Coercive force; Magnetic films; Magnetic materials; Magnetic properties; Perpendicular magnetic recording; Substrates; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
