| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1260096 | Journal of Rare Earths | 2010 | 4 Pages |
Rapidly solidified nanocrystalline a-Fe/Nd2Fe14B alloys with enhanced coercivity were obtained by melt spinning. The effects of Ti addition on the microstructure and magnetic properties of the nanocomposite a-Fe/Nd2Fe14B alloys were investigated by X-ray diffraction (XRD) and superconducting quantum interference device (SQUID) magnetometer. The analysis of XRD showed that Va-Fe estimated to be about 35.3% in the Ti-free a-Fe/Nd2Fe14B nanocomposites decreased down to 26.5% as the addition of was 5 at.% Ti. Accordingly, adding Ti resulted in relevant improvements of magnetic properties, especially of the coercivity Hc from 595 kA/m up to 1006 kA/m. The dependence of Mirrev(H)/2Mr on the reverse field H indicated that nucleation was the dominating mechanism for the magnetization reversal in these nanocomposites. The analysis of the temperature dependence of the demagnetization curve in the a-Fe/Nd2Fe14B nanocomposite magnets indicated that a reduction of aex could play a leading role in an increase in the coercivity of Ti-doped sample.
