Effect of cooling rate on magnetic domain structure and magnetic properties of Tb0.27Dy0.73Fe1.95 alloys solidified in high magnetic field

Effect of cooling rate on magnetic domain structure and magnetic properties of Tb0.27Dy0.73Fe1.95 alloys solidified in high magnetic field
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冷却速率对高磁场凝固Tb0.27Dy0.73Fe1.95合金磁畴结构和磁性能的影响

DOI:
10.1063/1.5004020
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发表时间:
2018-01
期刊:
影响因子:
1.6
通讯作者:
Qiang Wang
Qiang Wang
中科院分区:
材料科学4区
文献类型:
--
作者:
Tie Liu;Meng Doneg;Pengfei Gao;Yubao Xiao;Yi Yuan;Qiang Wang

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在这项工作中,Tb0.27Dy0.73Fe1.95合金在4.4 T的高磁场中以不同的冷却速率凝固。研究了凝固合金的磁致伸缩、晶体取向、磁化强度和磁畴的变化。磁场的施加可以诱导(Tb,Dy)Fe_2相的取向。然而,磁场的效果强烈地依赖于冷却速率。以5 °C/min凝固的合金磁致伸缩最大,取向最强,磁畴图像的明暗对比度最好,磁化速度最快,然后以降序依次是以1.5 °C/min和60 °C/min固化的合金。合金磁致伸缩的变化可以归因于磁场和磁场的共同作用引起的晶体取向和磁畴结构的变化和冷却速率。
In this work, Tb0.27Dy0.73Fe1.95 alloys were solidified in a high magnetic field of 4.4 T at various cooling rates. Changes in the magnetostriction, crystal orientation, magnetization, and magnetic domain of the solidified alloys were investigated. The application of the magnetic field can induce orientation of (Tb, Dy)Fe2 phase. However, the effect of the magnetic field is strongly dependent on the cooling rate. The alloy solidified at 5 °C/min shows the highest magnetostriction, strongest orientation, best contrast of light and dark in the domain image, and fastest magnetization, and followed in descending order by the alloys solidified at 1.5 °C/min and 60 °C/min. The change in the magnetostriction of the alloys can be attributed to the changes in crystal orientation and magnetic domain structure caused by both the magnetic field and cooling rate.
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