Magnetic reversal and magnetic memory effect in melt-spun Pr2Fe14B/α-Fe nanocomposite ribbons
来源期刊：Journal of Rare Earths2015年第12期
论文作者：韩广兵 苏浩 高汝伟 于淑云 康仕寿 朱明刚 李卫 X.B.Liu
文章页码：1303 - 1309
摘 要：The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr2Fe14B/α-Fe alloys prepared by melt spinning.It was shown that the magnetic properties of Pr2Fe14B/α-Fe nanocomposite were improved by an addition of 10 at.%CoCr,in particular,coercivity（jHc） from 4.9 up to 5.3 kOe,maximum energy product(（BH）max from 10.6 up to 13.9 MGOe,and remanence（Mr） from 94.2 up to 98.4 emu/g.The field dependencies of the reversible and irreversible magnetization components were derived from the recoil loops.Combining with the initial magnetization curves,the results indicated that the pinning of domain walls at the grain boundaries dominated the magnetization reversal in Pr2Fe14B/α-Fe nanocomposite alloys.The magnetic memory effect was studied by measuring the magnetic moment relaxation at a cycle negative magnetic field with time interval of 600 s.The exchange-spring magnets with magnetic memory effect have a high potential for high density magnetic recording.
韩广兵1，苏浩1，高汝伟1，于淑云1，康仕寿1，朱明刚2，李卫2，X.B.Liu3
1. School of Physics,Shandong University2. Division of Functional Materials,Central Iron & Steel Research Institute3. Department of Physics,University of Texas at Arlington
摘 要：The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr2Fe14B/α-Fe alloys prepared by melt spinning.It was shown that the magnetic properties of Pr2Fe14B/α-Fe nanocomposite were improved by an addition of 10 at.%CoCr,in particular,coercivity（jHc） from 4.9 up to 5.3 kOe,maximum energy product(（BH）max from 10.6 up to 13.9 MGOe,and remanence（Mr） from 94.2 up to 98.4 emu/g.The field dependencies of the reversible and irreversible magnetization components were derived from the recoil loops.Combining with the initial magnetization curves,the results indicated that the pinning of domain walls at the grain boundaries dominated the magnetization reversal in Pr2Fe14B/α-Fe nanocomposite alloys.The magnetic memory effect was studied by measuring the magnetic moment relaxation at a cycle negative magnetic field with time interval of 600 s.The exchange-spring magnets with magnetic memory effect have a high potential for high density magnetic recording.
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