Coherent magnetic imaging by TEM

Author

Chapman, J.N. ; Johnston, A.B. ; Heyderman, L.J. ; McVitie, S. ; Nicholson, W.A.P. ; Bormans, B.

Author_Institution

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

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4479

Lastpage

4484

Abstract

A novel transmission electron microscope optimised for the study of magnetic material is described. Using this instrument, a new method for revealing magnetic structures, coherent Foucault imaging, can be realised. Images appear directly in the form of magnetic interferograms and provide immediate access to a quantitative description of the induction distribution across the specimen. A simple analytical approach is given to the underlying theory and the main features are confirmed by computer modelling. Experimental images of small regular permalloy elements illustrate the power of the technique for studying domain structures

Keywords

Permalloy; digital simulation; electromagnetic induction; ferromagnetic materials; magnetic domains; transmission electron microscopy; FeNi; TEM; coherent Foucault imaging; coherent magnetic imaging; computer modelling; domain structures; induction distribution; magnetic interferograms; magnetic material; magnetic structures; small regular permalloy elements; transmission electron microscopy; Holography; Instruments; Lenses; Magnetic confinement; Magnetic fields; Magnetic force microscopy; Magnetic materials; Magnetization; Optical imaging; Transmission electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334125

Filename

334125