Thermal stability of ME recording media by measuring time and temperature effects

Author

Pan, Tao ; Spratt, Geoffrey W.D.

Author_Institution

Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3623

Lastpage

3625

Abstract

Different metal evaporated (ME) media were compared to investigate the cause of the temperature dependence of coercivity for ME media. It was found that exchange coupling and the temperature dependence of coercivity near room temperature are separate issues. By measuring the time dependence of coercivity, the crystalline anisotropy of Co was found to be the main cause of ME media´s temperature dependence of coercivity. The switching volume for Hi8 ME medium was found to be extremely small, about 1100 nm³, which indicates highly desirable low recording noise. Furthermore, by evaluating the value of K _uV/K_BT, ME media were found to be thermally stable

Keywords

coercive force; exchange interactions (electron); magnetic anisotropy; magnetic recording; thermal stability; ME recording media; coercivity; crystalline anisotropy; exchange coupling; metal evaporated media; noise; switching volume; temperature effects; thermal stability; time effects; Anisotropic magnetoresistance; Coercive force; Crystallization; Grain size; Magnetic field measurement; Magnetometers; Temperature dependence; Temperature measurement; Thermal stability; Time measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538710

Filename

538710