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Effects of the grain size on domain structure and thermal stability of sintered Nd-Fe-B magnets.
- Source :
-
Journal of Alloys & Compounds . Feb2018, Vol. 735, p1176-1180. 5p. - Publication Year :
- 2018
-
Abstract
- Thermal stability of coercivity and domain structure in sintered Nd–Fe–B magnets with various grain sizes has been studied. Microstructure analysis shows that the improved thermal stability arises from the grain morphology beneficial to a small effective demagnetization factor N eff . In-situ magnetic domain evolution during thermal demagnetization indicates that lower surface stray field in fine-grained magnets suppresses the reversion of domain in high temperature condition, which results from temperature-dependent competition between the local demagnetizing field and effective anisotropy field of surface grains. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETS
*MAGNETIC materials
*MAGNETISM
*THERMAL stability
*THERMAL properties
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 735
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 126870089
- Full Text :
- https://doi.org/10.1016/j.jallcom.2017.11.206