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Relationship between microstructure and magnetic domain structure of Nd-Fe-B melt-spun ribbon magnets

The relation between the microstructure, observed using an electron probe microanalyzer, and the domain structure, observed using a Kerr microscope, was established to evaluate the effects of hot rolling and the addition of Ti-C on the c-axis orientation and the magnetization process of hot-rolled N...

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Bibliographic Details
Published in:Frontiers of materials science 2015-06, Vol.9 (2), p.206-210
Main Authors: TAKEZAWA, Masaaki, TANEDA, Hiroyuki, MORIMOTO, Yuji
Format: Article
Language:English
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Summary:The relation between the microstructure, observed using an electron probe microanalyzer, and the domain structure, observed using a Kerr microscope, was established to evaluate the effects of hot rolling and the addition of Ti-C on the c-axis orientation and the magnetization process of hot-rolled Nd-Fe-B-Ti-C melt-spun ribbons. The addition of Ti-C promotes the c-axis orientation and high coercivity in the ribbons. Elemental mapping suggests a uniform elemental distribution; however, an uneven distribution of Ti was observed in an enlarged grain with Ti-enriched points inside the grain. The reversal domains that nucleated at the Ti-enriched point inside the grain cause low coercivity.
ISSN:2095-025X
2095-0268
DOI:10.1007/s11706-015-0297-5