Title :
Time decay of the remanent magnetization in longitudinal thin film recording media as a function of distributions of grain size and easy-axis orientation
Author :
Yang, Cheng ; Sivertsen, John M. ; Judy, Jack H.
Author_Institution :
Dept. of Chem. Eng. & Mater. Sci., Minnesota Univ., Minneapolis, MN, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
A model incorporating a gamma distribution of grain size and a Gaussian distribution of easy-axis orientation was used to study the time dependence of remanent magnetization in thin film recording media. Numerical calculations give qualitative agreement with experimental results on the time decay of remanent magnetization in longitudinal thin film recording media. The performance of the writing process and long-term information storage were evaluated in terms of the grain size distribution, easy-axis orientation distribution and applied reverse magnetic field
Keywords :
Gaussian distribution; gamma distribution; grain size; magnetic recording; magnetic thin films; magnetisation reversal; remanence; Gaussian distribution; activation energy barrier; applied reverse magnetic field; easy-axis orientation distribution; gamma distribution; grain size distribution; long-term information storage; longitudinal thin film recording media; model; remanent magnetization; thermally stimulated reversal transitions; time decay; uniaxial anisotropy; writing process; Anisotropic magnetoresistance; Energy barrier; Energy states; Grain size; Information technology; Magnetic fields; Magnetization; Micromagnetics; Neodymium; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
