Effect of titanium addition on the magnetic property of Nd 2Fe14B/α-Fe nanocomposite alloys

被引：0
作者：
Zhang P. [1 ]
Pan M. [1 ]
Jiao Z. [1 ]
Wu Q. [1 ]
Ge H. [1 ]
Fu R. [1 ]
机构：
[1] Department of Materials Science and Engineering, China Jiliang University
来源：
Journal of Rare Earths | 2010年 / 28卷 / 06期
关键词：
Coercivity; Magnetic property; Nanocomposite alloy; Rare earths;
D O I：
10.1016/S1002-0721(09)60212-X
中图分类号：
学科分类号：
摘要：
Rapidly solidified nanocrystalline a-Fe/Nd2Fe14B alloys with enhanced coercivity were obtained by melt spinning. The effects of Ti addition on the microstructure and magnetic properties of the nanocomposite a-Fe/Nd2Fe14B alloys were investigated by X-ray diffraction (XRD) and superconducting quantum interference device (SQUID) magnetometer. The analysis of XRD showed that Va-Fe estimated to be about 35.3 in the Ti-free a-Fe/Nd2Fe14B nanocomposites decreased down to 26.5 as the addition of was 5 at. Ti. Accordingly, adding Ti resulted in relevant improvements of magnetic properties, especially of the coercivity Hc from 595 kA/m up to 1006 kA/m. The dependence of M irrev(H)/2Mr on the reverse field H indicated that nucleation was the dominating mechanism for the magnetization reversal in these nanocomposites. The analysis of the temperature dependence of the demagnetization curve in the a-Fe/Nd2Fe14B nanocomposite magnets indicated that a reduction of aex could play a leading role in an increase in the coercivity of Ti-doped sample. © 2010 The Chinese Society of Rare Earths.
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页码：944 / 947
页数：3
相关论文
共 18 条
[1]  
Shen H.C., Zeng X.R., Zou J.Z., Xie S.H., Effect of super heat treatment on crystallization behavior and magnetic properties of Nd<sub>4.5</sub>Fe<sub>77</sub>B<sub>18.5</sub> nanocomposite, J. Rare Earths., 28, (2010)
[2]  
Feng W.C., Gao R.W., Yan S.S., Li W., Zhu M.G., Effects of phase distribution and grain size on the effective anisotropy and coercivity of nanocomposite Nd<sub>2</sub>Fe<sub>14</sub>B/α-Fe magnets, J. Appl. Phys., 98, (2005)
[3]  
Kneller E.F., Hawig R., Exchange-spring magnet: A new material principle for permanent magnets, IEEE. Trans. Magn., 27, (1991)
[4]  
Skomski R., Coey J.M.D., Giant energy product in nanostructured two-phase magnets, Phys. Rev. B., 48, (1993)
[5]  
Wang Z.C., Zhou S.Z., Zhang M.C., Qiao Y., High-performance α-Fe/Pr<sub>2</sub>Fe<sub>14</sub>B-type nanocomposite magnets produced by hot compaction under high pressure, J. Appl. Phys., 88, (2000)
[6]  
Zhang W.Y., Yan A.R., Zhang H.W., Shen B.G., Effect of the substitution of Co for Fe on phase components and magnetic properties of melt-spun Pr<sub>9</sub>Fe<sub>85</sub>B<sub>5</sub> nanocomposites, J. Alloys. Compd., 315, (2001)
[7]  
Harrison N.J., Davies H.A., Todd I., Nd<sub>2</sub>Fe<sub>14</sub>B-based nanocomposite magnets with transition metal and carbon additions, J. Appl. Phys., 99, (2006)
[8]  
Chang W.C., Chiou D.Y., Wu S.H., Ma B.M., Bounds C.O., High performance α-Fe/Nd<sub>2</sub>Fe<sub>14</sub>B-type nanocomposites, Appl. Phys. Lett., 72, (1998)
[9]  
Nagahama D., Ohkubo T., Miyoshi T., Hirosawa S., Hono K., Effect of Ti and C additions on the microstructure and magnetic properties of Nd<sub>6</sub>Pr<sub>1</sub>Fe<sub>80</sub>B<sub>13</sub> melt-spun ribbons, Acta Mater., 54, (2006)
[10]  
Whiston C., X-ray Methods, (1987)
12