Dependence of coercivity on the intergranular phase for nanocrystalline Nd-Fe-B magnet

作者：Liu M; Han G B; Yang W; Gao R W

来源：Journal of Alloys and Compounds, 2009, 486(1-2): 257-260.

DOI：10.1016/j.jallcom.2009.07.089

• Nanocrystalline magnet
• Exchange-coupling interaction
• Intergranular phase
• Coercivity

Assume that the intergranular phase (IP) existing between adjacent grains is a weak magnetic phase, and could weaken or interrupt the intergrain exchange-coupling interaction (IECI). Using our proposed cubic-grain anisotropy model, we investigate the effects of IP's thickness d, and its anisotropy constant K(1)(0)on the coercivity of nanocrystalline Nd-Fe-B magnet. Calculation results indicate that the coercivity increases with increasing d, but decreases with increasing K(1)(0). When d = 1.2 nm and K(1)(0) = 0.5K(1) (K(1) is the common anisotropy constant of the bulk Nd-Fe-B material), our calculated results are consistent with available experimental data.

• 出版日期2009-11-3
• 单位山东大学