DocumentCode
1451274
Title
Areal Density Potential for Non-Stoner-Wohlfarth Media
Author
Valcu, Bogdan ; McDaniel, Terry ; Wang, Xiaobin
Author_Institution
Seagate Technol., Fremont, CA, USA
Volume
45
Issue
10
fYear
2009
Firstpage
3565
Lastpage
3568
Abstract
In composite media switching of magnetization takes place through domain wall reversal, rather than coherent rotation, characteristic of Stoner-Wohlfarth (S-W) media. The angular dependence of coercivity on applied field angle deviates significantly from the S-W astroid. A modified Williams-Comstock formalism is used to show how this angular dependence modifies the effective field gradient, hence the transition length. Analytical expressions are deduced to express the areal density potential of various media designs.
Keywords
coercive force; composite materials; magnetic domains; magnetic switching; magnetisation reversal; areal density potential; coercivity; coherent rotation; composite media switching; domain wall reversal; magnetization; modified Williams-Comstock formalism; nonStoner-Wohlfarth media; transition length; Areal density; coercivity angular dependence; field gradient; transition parameter;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2009.2025973
Filename
5257322
Link To Document