Heat-treatment effect on microstructure and magnetic properties of sputtered CoCr films
- 15 March 1984
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 55 (6) , 2266-2268
- https://doi.org/10.1063/1.333631
Abstract
Heat‐treatment effects on the saturation magnetization Ms, the coercivity Hc, and the perpendicular anisotropy Ku of CoCr films with rather low Hc were investigated. Heat treatment up to 450 °C caused interdiffusion of Co and Cr atoms in a compositionally modulated film, resulting in reduction of Ms. On the other hand, heat treatment at 500 °C increased Ms, Hc, and Ku, which was interpreted to be the segregation of nonmagnetic alloy. Measurement of the temperature dependence of Ms supported this interpretation. Heat treatment at 500 °C seemed to have the similar effect on microstructure in a film to substrate heating during deposition. From Ku‐Ms curves, the packing density of the ferromagnetic region in heat‐treated films was estimated to be 77% of that in as‐sputtered ones.This publication has 4 references indexed in Scilit:
- Perpendicular anisotropy in Co-Cr filmsJournal of Magnetism and Magnetic Materials, 1983
- Magnetic Domain Structures in CoCr Films Studied by Lorentz MicroscopyJapanese Journal of Applied Physics, 1983
- Magnetic properties and microstructure of CoCr based vertical recording materials prepared by ion beam sputteringJournal of Magnetism and Magnetic Materials, 1983
- Co-Cr perpendicular recording medium by vacuum depositionIEEE Transactions on Magnetics, 1981