Domain behavior in sintered Nd-Fe-B magnets during field-induced and thermal magnetization change
- 15 April 1985
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 57 (8) , 4143-4145
- https://doi.org/10.1063/1.334646
Abstract
On sintered Nd-Fe-B permanent magnets, magnetic domain pattern changes in applied fields and at elevated temperatures were observed by the Kerr effect. Patterns on pole and side faces were recorded for different magnetization states in fields up to 17 kOe at 20 °C, and remanent patterns at temperatures up to TC. They are qualitatively interpreted. On pole faces, most grains are multidomain even at remanence. But the surface domains seen are not characteristic of the magnet interior. Side faces show mostly single-domain grains at remanence. These images appear to reflect bulk behavior. Walls are strongly pinned at grain boundaries but move easily in the main magnetic phase, a behavior analogous to that of sintered SmCo5.This publication has 3 references indexed in Scilit:
- Permanent magnet materials based on the rare earth-iron-boron tetragonal compoundsIEEE Transactions on Magnetics, 1984
- Magnetic domains and reversal mechanisms in sintered ‘‘SmCo5’’ permanent magnetsJournal of Applied Physics, 1984
- New material for permanent magnets on a base of Nd and Fe (invited)Journal of Applied Physics, 1984