Ni80Fe20镀层对Fe73.5Cu1Nb3Si13.5B9非晶条带的巨磁阻抗效应的影响

doi:10.3969/j.issn.1000-5641.2017.01.009

摘要/Abstract

摘要：

采用磁控溅射镀膜工艺, 在Fe_73.5Cu₁Nb₃Si_13.5B₉非晶条带的光滑面上溅射了 130~650 nm厚的Ni₈₀Fe₂₀薄膜, 制备了一系列 Ni₈₀Fe₂₀ / Fe_73.5Cu₁Nb₃Si_13.5B₉复合结构样品. 研究了镀层厚度对材料的镀层形貌、巨磁阻抗效应(Giant Magneto-Impedance, GMI)和磁滞回线的影响. 结果发现, 镀层厚度为 260nm 厚时, 样品的表面形貌最平整致密, 最大磁阻抗比提高到 33.0%. 在玻璃基片上溅射了相同厚度的系列Ni₈₀Fe₂₀薄膜, 其磁滞回线结果发现薄膜的各向异性方向随着厚度的增加由平行表面转变成垂直于表面. 正是Ni₈₀Fe₂₀镀层各向异性的方向改变, 影响了镀层与条带间的相互作用, 进而影响复合结构样品的磁阻抗效应.

关键词: 相互作用, 磁阻抗效应, 复合结构

Abstract:

Different thickness of Ni₈₀Fe₂₀ films are deposited on the Fe_73.5Cu₁Nb₃Si_13.5B₉ amorphous ribbons using RF (radio frequency) magnetron sputtering method. The magnetic properties and magneto impedance effect are measured and compared with as-cast Fe_73.5Cu₁Nb₃Si_13.5B₉amorphous ribbons. The results show that the ribbon coated with 260 nm Ni₈₀Fe₂₀ layer achieves a much better performance than others, which produces a GMI (giant magneto-impedance) ratio of 33.0%. It is found that the surface of 260 nm Ni80Fe20 layer is smoother and the particle size is relatively smaller. The hysteresis loops of the ribbons with and without Ni₈₀Fe₂₀ coating layer are almost unchanged. However, the hysteresis loops of the Ni₈₀Fe₂₀ films sputtered onto glass substrate indicate the shift of anisotropy direction from parallel to normal to the surface as the thickness increases. The shifting will influence the magnetic exchange interaction between the amorphous ribbons and the Ni₈₀Fe₂₀ coating layers. The variation of GMI effect can be interpreted by the surface structure and magnetic exchange interaction.

Key words: exchange interaction, magneto-impedance, composite structure

韩洋; 吕文星; 赵振杰; . Ni₈₀Fe₂₀镀层对Fe_73.5Cu₁Nb₃Si_13.5B₉非晶条带的巨磁阻抗效应的影响[J]. 华东师范大学学报(自然科学版), doi: 10.3969/j.issn.1000-5641.2017.01.009.

HAN Yang, LYU Wen-xing, ZHAO Zhen-jie. Magneto-impedance effect of amorphous Fe_73.5Cu₁Nb₃Si_13.5B₉ ribbons with Ni₈₀Fe₂₀ permalloy film[J]. Journal of East China Normal University(Natural Sc, doi: 10.3969/j.issn.1000-5641.2017.01.009.

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Ni₈₀Fe₂₀镀层对Fe_73.5Cu₁Nb₃Si_13.5B₉非晶条带的巨磁阻抗效应的影响

Magneto-impedance effect of amorphous Fe_73.5Cu₁Nb₃Si_13.5B₉ ribbons with Ni₈₀Fe₂₀ permalloy film

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