Energy barrier and magnetic properties of exchange-coupled hard-soft bilayer

Author

Shan, Z.S. ; Liu, J.P. ; Chakka, Vamsi M. ; Zeng, H. ; Jiang, J.S.

Author_Institution

Komag Inc., San Jose, CA, USA

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2907

Lastpage

2909

Abstract

In this paper, the magnetic properties of an exchange-coupled hard-soft bilayer system have been analyzed based on its energy-barrier characteristics. Analytical solutions of the magnetic and structural parameters such as the energy barriers, the coercivities, the critical coupling-constant, the critical coupling dimension of soft phase, and the energy product have been derived. These analytical solutions reveal the correlation between the magnetic properties and the physical dimensions of its soft and hard phase constituents.

Keywords

coercive force; exchange interactions (electron); magnetic multilayers; nanostructured materials; permanent magnets; soft magnetic materials; Stoner-Wohlfarth model; coercivities; critical coupling dimension; critical coupling-constant; energy product; energy-barrier characteristics; exchange-coupled hard-soft bilayer; magnetic properties; optimal design; physical dimensions; spring magnet; structural parameters; Coercive force; Couplings; Energy barrier; Magnetic analysis; Magnetic anisotropy; Magnetic properties; Magnetization; Perpendicular magnetic anisotropy; Soft magnetic materials; Springs;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803226

Filename

1042406