Title :
Measurement of Subnanosecond Longitudinal Media Switching
Author :
Mallary, Michael ; Benakli, Mourad ; Beauregard, Roger
Author_Institution :
Maxtor Corp., Shrewsbury, MA
Abstract :
Measurement results of the switching field of a thin film longitudinal media sample for times down to ~0.4 ns are only 5% larger than the Sharrock´s Law extrapolation of data measured with field exposure times ranging between 8 ns and 270 hr. LLG based micromagnetic analysis verify that the lack of a large gyromagnetic enhancement of the switching field for subnanosecond pulses is due to exchange and magnetostatic interactions between the grains. This analysis was also used to verify that the use of a DC pedestal field that is half of the total field does not significantly alter the results
Keywords :
extrapolation; gyromagnetic effect; magnetic recording; magnetic switching; micromagnetics; Sharrock law extrapolation; gyromagnetic enhancement; magnetostatic interactions; micromagnetic analysis; subnanosecond longitudinal media switching; subnanosecond pulses; switching field; thin film longitudinal media; Gyromagnetism; Magnetic analysis; Magnetic anisotropy; Magnetic field measurement; Magnetic heads; Magnetic switching; Magnetostatics; Micromagnetics; Perpendicular magnetic anisotropy; Transistors; Dynamic coercivity; LLG; Sharrock´s law; gyromagnetic; pulsed field; switching time; thin film magnetic media;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878686
