Back to Search
Start Over
Effect of Zr on the microstructure, magnetic domain structure, microchemistry and magnetic properties in Sm(CobalCu0.08Fe0.10Zrx)8.5 magnets.
- Source :
-
Journal of Physics D: Applied Physics . Dec2007, Vol. 40 Issue 24, p7620-7624. 5p. - Publication Year :
- 2007
-
Abstract
- The effect of Zr on the microstructure, microchemistry and coercivity of Sm(CobalCu0.08Fe0. 10Zrx)8.5 (x = 0-0.10) magnets has been systematically investigated. The presence of Zr is responsible for the formation of the lamella structure. With increasing Zr content, a cellular-like structure gradually develops while the density of the lamella phase increases. A proper Zr content (0.015-0.060 at.%) is the key to form a complete and uniform cellular structure. Microchemistry data show that the Cu content in the cell boundaries in the magnet with 0.04 at.% Zr is higher than that with 0.015 at.% Zr, although both samples have similar microstructure morphologies. Higher coercivity is obtained in samples where the domain walls (DWs) are pinned at cell boundaries. For Zr-free or higher Zr samples, DWs nucleated at grain boundaries are responsible for the reduction in coercivity. During isothermal ageing, at a fixed Zr content, the coercivity is developed with increasing ageing time. These results clearly show that Zr plays an important role in the formation of a uniform cellular structure with the right microchemistry and that a critical amount of Zr is needed for the optimum magnetic properties. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ANALYTICAL chemistry
*MICROMECHANICS
*MAGNETIC properties
*CRYSTAL growth
Subjects
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 40
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 27792191
- Full Text :
- https://doi.org/10.1088/0022-3727/40/24/004