Title :
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
fDate :
3/1/1988 12:00:00 AM
Abstract :
The magnetic domain structures supported by regularly shaped permalloy (Ni82.5Fe17.5) 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; Ni82.5Fe17.5/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;
Journal_Title :
Magnetics, IEEE Transactions on
