1. Micromagnetic Study for Magnetic Properties of Exchange-Coupled Nanocomposite Magnetic Systems With $\alpha$ -Fe Grains Embedded in Nd2Fe14B Matrix.
- Author
-
Ryo, Hyok-Su, Hu, Lian-Xi, Kim, Jin-Guk, and Yang, Yu-Lin
- Subjects
- *
MICROMAGNETICS , *MICROSTRUCTURE , *FINITE element method , *GRAIN size , *MAGNETIC coupling - Abstract
In this paper, the relationship between the magnetic properties and microstructures of nanocomposite isotropic exchange-coupled systems with the structure of \alpha -Fe crystalline grains embedded in Nd2Fe14B matrices has been estimated by micromagnetic finite-element method. And then, the results have been analyzed by means of the effectiveness of exchange coupling between the magnetically hard Nd2Fe14B and soft \alpha -Fe phase of the exchange-coupled Nd2Fe 14\text{B}/\alpha -Fe magnetic systems. The effectiveness of interphase exchange coupling has been estimated by the volume fractions of exchange coupling area near phase boundaries between \alpha -Fe grains and Nd2Fe14B matrix. The results have shown the micromagnetic mechanism of the advanced magnetic properties of the exchange coupled magnetic systems with the structure of $\alpha $ -Fe grains embedded in Nd2Fe14B matrix. In addition, the optimal magnetic properties can be expected in the case of comparatively the large grain sizes of $\alpha $ -Fe and Nd2Fe14B phase due to the characteristic structure of those magnetic systems. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF