Abstract
Post-sinter-annealing temperature (Ta) dependences of the chemical and magnetic properties of intergranular (grain boundary; GB) phase in a Nd14.0Fe79.7B6.2Cu0.1 sintered magnet have been investigated by x-ray absorption spectroscopy and its magnetic circular dichroism. A relative change of the Cu concentration in the GB phase is found to depend on Ta and shows the maximum at Ta = 500 °C. The Ta-dependence of the Cu concentration was very similar to that of the coercivity. On the other hand, there is no significant Ta-dependence for the magnetization at the fracture surface: the Fe magnetic moment is 1.7 ± 0.036 μB at all Ta. The Cu-rich layer segregated in the GB phase would have a key role in the coercivity enhancement of the Nd-Fe-B sintered magnet.
Original language | English |
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Article number | 17B313 |
Journal | Journal of Applied Physics |
Volume | 117 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2015 May 7 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)