Effect of film morphology on grain boundary segregation induced magnetic properties in heat treated CoCrPt/Cr films

Author

Choe, G.

Author_Institution

Dept. of Metall. Eng., Chonnam Nat. Univ., Kwangju, South Korea

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

2809

Lastpage

2811

Abstract

Effect of Co grain morphology on Cr segregation induced magnetic properties was investigated in heat treated CoCrPt/Cr thin films. In this work, interdiffusion and Cr segregation induced Co grain isolation were studied by post-deposition annealing of the CoCrPt films deposited on a Cr underlayer at different sputtering conditions. The films with voided boundaries showed a stronger heating temperature dependence of magnetic properties than the dense films, due to the promoted Cr segregation at the boundaries. TEM observation indicated that Cr was segregated from the Cr underlayer to the void boundaries of the CoCrPt films. The grain morphology of as-deposited films played an important role in Cr segregation during heat treatment, and the intergranular exchange decoupling was enhanced by the diffusion of Cr atoms into the voids isolating the Co grains

Keywords

annealing; chemical interdiffusion; chromium; chromium alloys; cobalt alloys; exchange interactions (electron); ferromagnetic materials; grain boundary segregation; magnetic thin films; platinum alloys; sputtered coatings; transmission electron microscopy; voids (solid); CoCrPt films; CoCrPt-Cr; Cr underlayer; TEM; annealing; grain boundary segregation; grain isolation; grain morphology; heat treatment; interdiffusion; intergranular exchange decoupling; magnetic properties; sputtering; void boundaries; Annealing; Chromium; Grain boundaries; Heat treatment; Heating; Magnetic films; Magnetic properties; Morphology; Sputtering; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490159

Filename

490159