Grain-boundary micromagnetism

Author

Skomski, R. ; Zeng, H. ; Sellmyer, D.J.

Author_Institution

Dept. of Phys. & Astron., Nebraska Univ., Lincoln, NE, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2549

Lastpage

2551

Abstract

Continuum and layer-resolved calculations are used to investigate the spin structure in the vicinity of grain boundaries. Reduced exchange in the grain-boundary region gives rise to a quasi-discontinuity of the magnetization and yields a perturbation which decays exponentially inside the grains. An effective intergranular exchange is obtained as a micromagnetically well-defined function of the grain-boundary exchange, and it is discussed how grain boundaries affect the hysteresis loops of nanostructures

Keywords

exchange interactions (electron); grain boundaries; magnetic hysteresis; magnetic structure; magnetisation; nanostructured materials; continuum calculations; grain boundaries; grain-boundary micromagnetism; hysteresis loops; intergranular exchange; layer-resolved calculations; magnetization; nanostructures; perturbation; quasi-discontinuity; reduced exchange; spin structure; Anisotropic magnetoresistance; Grain boundaries; Magnetic anisotropy; Magnetic hysteresis; Magnetic recording; Magnetization; Magnets; Perpendicular magnetic anisotropy; Soft magnetic materials; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951231

Filename

951231