Advantages of CNT–MFM probes in observation of domain walls of soft magnetic materials

The advantage of the CoFe-coated carbon nanotube (CNT) probes in a magnetic force microscope (MFM) is verified on in-plane magnetized soft magnetic materials. CoFe-coated CNT, standard and low-moment MFM probes were used to observe closure domains in square and rectangular Permalloy elements. The pe...

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Bibliographic Details
Published in:Surface science 2007-11, Vol.601 (22), p.5289-5293
Main Authors: Kuramochi, H., Manago, T., Koltsov, D., Takenaka, M., Iitake, M., Akinaga, H.
Format: Article
Language:English
Subjects:
Carbon nanotube probe
Closure domain
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic force microscopy
Permalloy
Physics
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Summary:The advantage of the CoFe-coated carbon nanotube (CNT) probes in a magnetic force microscope (MFM) is verified on in-plane magnetized soft magnetic materials. CoFe-coated CNT, standard and low-moment MFM probes were used to observe closure domains in square and rectangular Permalloy elements. The perturbative effect of the CNT–MFM probe was far less than that of a standard MFM probe. Domain walls were clearly observed as a pair of dark and bright lines which was in agreement with the micromagnetic simulations. The vortex core was also clearly observed using the CNT–MFM probes.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2007.04.222