Title :
Effects of demagnetization fields on the angular dependence of coercivity of longitudinal thin film media
Author :
Huang, M. ; Judy, J.H.
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
The angular dependence of the apparent coercivity for coherent rotations and incoherent curling and fanning rotations in high-coercivity longitudinal thin film magnetic recording media is calculated and presented with corrections for demagnetization fields in the direction of the applied field. The model used for representing a thin film is a single particle having a fixed magnitude of saturation magnetization and an in-plane easy axis. A sharp peak is found in the angular dependence of the apparent coercivity for incoherent, but not for coherent, rotations. The peak magnitude of the apparent coercivity calculated in units of the anisotropy field is found to increase with increasing saturation magnetizations for curling but not for fanning. The computations of the angular dependence of the apparent coercivity are compared with measurements on high-coercivity longitudinal thin film magnetic recording media
Keywords :
coercive force; demagnetisation; magnetic recording; magnetisation; angular dependence; coercivity; coherent rotations; curling rotations; demagnetization fields; fanning rotations; in-plane easy axis; longitudinal thin film media; peak magnitude; saturation magnetization; saturation magnetizations; Anisotropic magnetoresistance; Coercive force; Demagnetization; Magnetic field measurement; Magnetic films; Magnetic properties; Magnetic recording; Micromagnetics; Saturation magnetization; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on