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通过磁弹性各向异性操控非晶微丝中的畴壁动力学。

Manipulation of domain wall dynamics in amorphous microwires through the magnetoelastic anisotropy.

作者信息

Zhukov Arcady, Blanco Juan Maria, Ipatov Mihail, Chizhik Alexander, Zhukova Valentina

机构信息

Department of Material Physics, Chemistry Faculty, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P,O, Box 1072, San Sebastián, 20080, Spain.

出版信息

Nanoscale Res Lett. 2012 Apr 18;7(1):223. doi: 10.1186/1556-276X-7-223.

DOI:10.1186/1556-276X-7-223
PMID:22512936
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3432590/
Abstract

We studied the effect of magnetoelastic anisotropy on domain wall (DW) dynamics and remagnetization process of magnetically bistable Fe-Co-rich microwires with metallic nucleus diameters (from 1.4 to 22 μm). We manipulated the magnetoelastic anisotropy applying the tensile stresses and changing the magnetostriction constant and strength of the internal stresses. Microwires of the same composition of metallic nucleus but with different geometries exhibit different magnetic field dependence of DW velocity with different slopes. Application of stresses resulted in decrease of the DW velocity, v, and DW mobility, S. Quite fast DW propagation (v until 2,500 m/s at H about 30 A/m) has been observed in low magnetostrictive magnetically bistable Co56Fe8Ni10Si10B16 microwires. Consequently, we observed certain correlation between the magnetoelastic energy and DW dynamics in microwires: decreasing the magnetoelastic energy, Kme, DW velocity increases.

摘要

我们研究了磁弹性各向异性对具有金属核直径（1.4至22μm）的富铁钴磁双稳微丝的畴壁（DW）动力学和再磁化过程的影响。我们通过施加拉应力以及改变磁致伸缩常数和内应力强度来操控磁弹性各向异性。具有相同金属核组成但不同几何形状的微丝表现出不同斜率的DW速度与磁场的依赖关系。施加应力导致DW速度v和DW迁移率S降低。在低磁致伸缩的磁双稳Co56Fe8Ni10Si10B16微丝中观察到相当快的DW传播（在H约为30A/m时v可达2500m/s）。因此，我们观察到微丝中磁弹性能与DW动力学之间存在一定的相关性：磁弹性能Kme降低，DW速度增加。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/d69ea1358599/1556-276X-7-223-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/62556e70991f/1556-276X-7-223-1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/44d5f14e2f8b/1556-276X-7-223-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/1b4bd1f40837/1556-276X-7-223-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/7a2ac69ad706/1556-276X-7-223-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/d69ea1358599/1556-276X-7-223-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/62556e70991f/1556-276X-7-223-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/65b54c67be82/1556-276X-7-223-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/8b623bd2cafa/1556-276X-7-223-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/726bdb7e634e/1556-276X-7-223-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/44d5f14e2f8b/1556-276X-7-223-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/1b4bd1f40837/1556-276X-7-223-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/7a2ac69ad706/1556-276X-7-223-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c53/3432590/d69ea1358599/1556-276X-7-223-8.jpg

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