Magnetization reversal behavior and first-order reversal curve diagrams in high-coercivity Zr-doped α-Fe/Nd2Fe14B nanocomposite alloys

• 作者: Tian-Chi Ji Min-Xiang Pan Hong-Liang Ge Qiong Wu Peng-Yue Zhang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1232-1238
• 页数: 7页
• 语种: 英文

摘要

In the present work,the magnetization reversal behavior for the melt spinning(Nd0.8Ce0.2)2Fe1 2Co2-xZrxB(x = 0,0.5)permanent alloys with high coercivity was investigated by analyzing the hysteresis curves and the recoil loops.Compared to the Zr-free alloy,the Zr-doped sample obtains higher magnetic properties:coercivity of Hcj = 650.5 kA·m-1,squareness of Hk/Hcj = 0.76 and maximum energy product of(BH)max = 131.0 kJ·m-3.The first-order reversal curves(FORCs)analysis was taken to identify optimal conditions of exchange coupling for the Zr-free and Zr-doped alloys.The coercivity mechanism of the α-Fe/Nd2Fe14B nanocomposite alloys was analyzed by the angular dependence of the coercive field as measured for the Zr-doped sample.The results show that the mag-netic reverse process of the Zr-doped sample can be explained by the pinning model.