Effect of niobium addition on magnetization reversal behavior for SmCo-based magnets with TbCu7-type structure
来源期刊：Journal of Rare Earths2016年第1期
论文作者：胡晨宇 泮敏翔 吴琼 葛洪良 王秀敏 张朋越
文章页码：61 - 65
摘 要：The effect of Nb addition on the microstructure and magnetic properties of nanocrystalline Sm（CobalNbxZr0.02）7 permanent magnet were investigated. The magnetization reversal behavior for ball milled Sm（CobalNbxZr0.02）7 samples with high coercivity was investigated by analyzing hysteresis curves and recoil loops of demagnetization curves. Nb addition proved to result in relevant improvement in the magnetic properties, especially in the coercivity Hc. It was shown that the magnetic properties of Sm（CobalNbxZr0.02）7 nanocrystalline magnets were improved by an additional 0.06 at.% Nb. In particular, Hc was improved from 602 to 786 k A/m at room temperature. The maximum value of the integrated recoil loops area for 0.06 at.% Nb-doped samples of 1.81 k J/m3 was much lower than that of the Nb-free sample, which could be explained by a smaller recoverable portion of the magnetization remaining in the Nb-doped sample when the applied field was below the coercivity Hc. The nucleation field Hn for irreversible magnetization reversal of the magnetically hard phase were calculated by analyzed in terms of the ΔMirrev-H curve and the Kondorsky model.
胡晨宇1，泮敏翔1，吴琼1，葛洪良1，王秀敏1，张朋越1
1. Magnetism Key Laboratory of Zhejiang Province China Jiliang University
摘 要：The effect of Nb addition on the microstructure and magnetic properties of nanocrystalline Sm（CobalNbxZr0.02）7 permanent magnet were investigated. The magnetization reversal behavior for ball milled Sm（CobalNbxZr0.02）7 samples with high coercivity was investigated by analyzing hysteresis curves and recoil loops of demagnetization curves. Nb addition proved to result in relevant improvement in the magnetic properties, especially in the coercivity Hc. It was shown that the magnetic properties of Sm（CobalNbxZr0.02）7 nanocrystalline magnets were improved by an additional 0.06 at.% Nb. In particular, Hc was improved from 602 to 786 k A/m at room temperature. The maximum value of the integrated recoil loops area for 0.06 at.% Nb-doped samples of 1.81 k J/m3 was much lower than that of the Nb-free sample, which could be explained by a smaller recoverable portion of the magnetization remaining in the Nb-doped sample when the applied field was below the coercivity Hc. The nucleation field Hn for irreversible magnetization reversal of the magnetically hard phase were calculated by analyzed in terms of the ΔMirrev-H curve and the Kondorsky model.
关键词：
