Microstructure and magnetic studies of the Fe-Nd-Al magnets

作者：Bai, Q.^*; Wang, J.; Hao, Y. F.; He, J. M.; Xu, H.; Xia, S.

来源：Physica B: Condensed Matter , 2014, 438: 131-136.

DOI：10.1016/j.physb.2014.01.019

• Amorphous alloys
• Hard magnetic materials
• Fe-Nd-Al
• Magnetic measurement

Ribbons of the Fe53Nd37Al10 alloy with different rolling rates were prepared by the melt spinning method. The magnetic properties, phase composition and microstructure of the ribbons were systematically investigated by vibrating sample magnetometer (VSM), differential scanning calorimeter (DSC). X-ray diffraction (XRD), scanning electron microscope (SEM), focused ion beam (FIB) and high resolution transmission electron microscope (HRTEM). The micrograph shows that the ribbon melt-spun at 5 m s(-1) is composed of Nd2Fe17 phase with approximately 5 mu m in size and some clusters of 5 nm in diameter in the amorphous matrix, while no obviously crystallized phase is detected in the sample melt-spun at 20 m s(-1). Both of the ribbons melt-spun at 5 m s(-1) and 20 m s(-1) show hard magnetic properties at room temperature, but they exhibit different magnetic properties at low temperature. The hard magnetic property of the ribbon melt-spun at 5 m s(-1) would be due to the exchange coupling interactions and pinning effect. However, the magnetism of the sample melt-spun at 20 m s(-1) would be contributed to the pinning effect.

• 出版日期2014-4-1
• 单位上海大学