Magnetic structure determination in small regularly shaped particle using transmission electron microscopy

Author

McVitie, S. ; Chapman, J.N.

Author_Institution

Dept. of Phys. & Astron., Glasgow Univ., UK

Volume

24

Issue

2

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

1778

Lastpage

1780

Abstract

The magnetic domain structures supported by regularly shaped permalloy (Ni_82.5Fe_17.5) particles whose in-plane dimensions are in the micrometer and submicrometer range are investigated. Two modes of Lorentz microscopy are used in this study; the Fresnel mode of conventional transmission electron microscopy and the differential phase contrast mode of scanning transmission electron microscopy. Results from particles of varying size and shape are presented and the transition from multidomain to near-single-domain behavior is discussed. Finally, some details are given of how the domain-wall structure varies with particle thickness and the angle through which the magnetization rotates.

Keywords

Permalloy; magnetic domain walls; magnetic properties of fine particles; magnetic structure; magnetisation; particle size; scanning-transmission electron microscope examination of materials; transmission electron microscope examination of materials; Fresnel mode; Lorentz microscopy; Ni_82.5Fe_17.5/bin; differential phase contrast mode; domain-wall structure; magnetic domain structures; magnetisation; particle size; particle thickness; permalloy; scanning transmission electron microscopy; transmission electron microscopy; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetization; Probes; Resists; Scanning electron microscopy; Shape control; Soft magnetic materials; Transmission electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.11599

Filename

11599