Title :
Switching field time dependence of thin film media
Author :
Mallary, Michael L. ; Torabi, Adam F. ; Beauregard, Roger
Author_Institution :
Quantum Corp. Technol. & Eng., Shrewsbury, MA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
The dependence of remanent coercivity of thin film media on pulse duration has been measured for time intervals from 1.4 ns to 270 hr. The apparatus combines the field from a microconductor with that of a DC magnet to switch the media. The data from 53 μs to 270 hr fits well to Sharrock´s Law with an exponent of 0.716. The data for times less than 8 ns indicate weak gyro-magnetic enhancement of the switching field. Micromagnetic simulation shows that this can be explained by either magnetostatic or exchange coupling between the grains
Keywords :
coercive force; exchange interactions (electron); hard discs; magnetic thin film devices; remanence; 1.4 ns to 270 hr; DC magnet; Sharrock´s Law; exchange coupling; gyro-magnetic enhancement; hard disk drives; high coercivity media; magnetostatic coupling; microconductor; micromagnetic simulation; pulse duration; remanent coercivity; switching field; switching field time dependence; thin film media; Coercive force; Couplings; Magnetic field measurement; Magnetic switching; Magnetostatics; Micromagnetics; Pulse measurements; Switches; Time measurement; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
