Magnetization reversal behavior in high coercivity Zr doped alpha-Fe/Nd2Fe14B nanocomposite alloys

作者：Zhang, P. Y.^*; Hiergeist, R.; Luedke, J.; Albrecht, M.; Ge, H. L.

来源：Journal of Applied Physics, 2010, 108(4): 043905.

DOI：10.1063/1.3457105

• MICROMAGNETIC ANALYSIS
• EXCHANGE
• REMANENCE
• MAGNETS
• FE
• MICROSTRUCTURE
• DEPENDENCE
• FIELD
• GA

The magnetization reversal behavior for rapidly solidified Zr-doped alpha-Fe/Nd2Fe14B alloys with high coercivity has been investigated by analyzing hysteresis Curves and recoil loops of demagnetization curves. A drastic increase in the coercivity H-c from 620 to 855 kA/m at room temperature by an addition of 1 at. % Zr in alpha-Fe/Nd2Fe14B. alloys has been observed. The maximum value of the integrated recoil loop area for Zr-doped samples of 3.05 kJ/m(3) is much lower than that of the Zr-free sample. This result can be explained by a larger recoverable portion of the magnetization remaining in the Zr-free sample as long as the applied reversal field is below the coercivity H-c, i.e., it is an effect of an increased exchange-coupling in the Zr-free sample. The coercivity mechanism of the alpha-Fe/Nd2Fe14B nanocomposite magnets was analyzed in terms of the Kondorsky model and the plot of H-c(T)/M-s(T) versus H-N(min)(T)/M-s(T) (Kronmuller plot), respectively.

• 出版日期2010-8-15
• 单位中国计量大学