Measurement of Subnanosecond Longitudinal Media Switching

Author

Mallary, Michael ; Benakli, Mourad ; Beauregard, Roger

Author_Institution

Maxtor Corp., Shrewsbury, MA

Volume

42

Issue

10

fYear

2006

Firstpage

2402

Lastpage

2404

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.878686

Filename

1704313