Interaction effects in switching of a two dimensional array of small particles

Author

Pardavi-Horvath, Martha ; Zheng, Guobao ; Vertesy, Gabor ; Magni, Alessandro

Author_Institution

Inst. for Magnetics Res., George Washington Univ., Washington, DC, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4469

Lastpage

4471

Abstract

The magnetostatic interaction between elements of a regular two-dimensional array of rectangular garnet pixels has been investigated. The up- and down switching fields of an individual pixels, have been measured magnetooptically. The switching characteristics of a given pixel depends on the state of the neighbors. In this work the effect of the magnetization state of the first 5 coordination shells on a central, test pixel was investigated experimentally and numerically. The interaction field, i.e. the demagnetizing/magnetizing effects, is calculated exactly and in the dipole approximation for 24 pixels surrounding the central pixel. A good agreement between experimental and numerical results has been obtained

Keywords

demagnetisation; garnets; magnetic particles; magnetic switching; magnetisation; magneto-optical effects; magnetostatics; coordination shells; demagnetizing effects; dipole approximation; interaction effects; interaction field; magnetization state; magnetostatic interaction; rectangular garnet pixels; rectangular islands; small particles; switching; switching fields; two dimensional array; Garnets; Magnetic anisotropy; Magnetic field measurement; Magnetic hysteresis; Magnetic separation; Magnetic switching; Magnetization; Magnetooptic effects; Magnetostatics; Perpendicular magnetic anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538900

Filename

538900