Magnetic force microscopy investigation of the domain structure of nanocomposite Nd2Fe14B/Fe3B magnets

In this paper, a detailed magnetic force microscopy study has been made of the domain structure of isotropic nanocomposite Nd2Fe14B/Fe3B magnet ribbons prepared by melt-spinning. The domain structure is composed of interaction domains a few hundred nanometers in size, which indicates the presence of...

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Bibliographic Details
Published in:Acta materialia 2011, Vol.59 (2), p.531-536
Main Authors: SZMAJA, Witold, GROBELNY, Jarosław, CICHOMSKI, Michał, HIROSAWA, Satoshi, SHIGEMOTO, Yasutaka
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Grains
Magnetic fields
Magnetization
Magnets
Melt spinning
Metals. Metallurgy
Microscopy
Nanocomposites
Nanomaterials
Nanostructure
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Summary:In this paper, a detailed magnetic force microscopy study has been made of the domain structure of isotropic nanocomposite Nd2Fe14B/Fe3B magnet ribbons prepared by melt-spinning. The domain structure is composed of interaction domains a few hundred nanometers in size, which indicates the presence of a strong exchange coupling between the grains. Within the interaction domains, a fine substructure on the same scale as the grain size is observed with high-contrast and clarity, which is an improvement over earlier results. As a consequence, the interaction domains are clusters of many single-domain grains whose magnetization directions are not precisely the same but differ slightly. In general, the interaction domains have both perpendicular and in-plane magnetization components. The domain width of the interaction domains (260A plus or minus 20)nm was determined by digital means (using the method of Bodenberger and Hubert), in contrast to previous investigations.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2010.09.056