Temperature dependence of domain wall creep motion in ferrimagnetic Tb/CoFeB/MgO microwires

Temperature dependence of domain wall creep motion in ferrimagnetic Tb/CoFeB/MgO microwires
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铁磁 Tb/CoFeB/MgO 微丝中畴壁蠕变运动的温度依赖性

DOI:
10.1016/j.jmmm.2022.169251
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发表时间:
2022
影响因子:
2.7
通讯作者:
Ono Teruo
Ono Teruo
中科院分区:
材料科学3区
文献类型:
--
作者:
Shiota Yoichi;Noda Kaoru;Hirata Yuushou;Kuwano Kyosuke;Funada Shinsaku;Hisatomi Ryusuke;Moriyama Takahiro;Stebliy Maksim;Ognev Alexey V.;Samardak Alexander S.;Ono Teruo

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在这项工作中,我们研究的磁畴壁(DW)蠕变运动的温度依赖性在亚铁磁性Tb/CoFeB/MgO微丝通过使用一个实时DW检测方法。通过测量不同温度下随场变化的DW速度,从蠕变-标度分析中得到蠕变-标度常数和特征速度。我们发现,DW速度随温度的变化显着,并主要归因于蠕变标度常数的变化,而不是在特征速度。每个参数的温度依赖性的可能机制进行了讨论。
In this work, we examine the temperature dependence of magnetic domain wall (DW) creep motion in ferrimagnetic Tb/CoFeB/MgO microwires by using a real-time DW detection method. By measuring the field-dependent DW velocity at various temperatures, the creep-scaling constant and the characteristic velocity were evaluated from the creep-scaling analysis. We found that the DW velocity changed significantly with temperature and was mainly attributed to the variation in the creep-scaling constant than that in the characteristic velocity. Possible mechanisms for the temperature dependence of each parameter are discussed.
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