Experimental Evidence of Domain Wall Assisted Switching in Composite Media

Author

Girt, Erol ; Dobin, A.Yu. ; Valcu, Bogdan ; Richter, H.J. ; Wu, X. ; Nolan, Tomas P.

Author_Institution

Seagate Technol., Fremont, CA

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2166

Lastpage

2168

Abstract

We fabricated perpendicular media with decoupled magnetic grains that consist of a low magnetocrystalline anisotropy layer with various thicknesses directly grown on top of a high anisotropy layer. Nonuniform magnetization rotation was confirmed by measuring coercivity and remanent coercivity in these media. The reduction of remanent coercivity with increasing the low anisotropy layer thickness, measured at low temperature, is consistent with micromagnetic calculations. These results suggest domain wall assisted switching in composite media

Keywords

magnetic anisotropy; magnetic domain walls; magnetic switching; perpendicular magnetic recording; remanence; composite media; decoupled magnetic grains; domain wall assisted switching; low magnetocrystalline anisotropy layer; micromagnetic calculations; nonuniform magnetization rotation; remanent coercivity; Anisotropic magnetoresistance; Coercive force; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetization; Perpendicular magnetic anisotropy; Rotation measurement; Temperature measurement; Thickness measurement; Magnetization reversal; perpendicular media;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.894176

Filename

4202735