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arXiv 2201.04925cond-mat.mes-hall
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从非对称泡畴膨胀确定界面Dzyaloshinskiii-Moriya相互作用的关键点

Key points in the determination of the interfacial Dzyaloshinskii-Moriya interaction from asymmetric bubble domain expansion

A. Magni, G. Carlotti, A. Casiraghi, E. Darwin, G. Durin, L. Herrera Diez, B. J. Hickey, A. Huxtable, C. Y. Hwang, G. Jakob, C. Kim, M. Kläui, J. Langer, C. H. … 展开作者

A. Magni, G. Carlotti, A. Casiraghi, E. Darwin, G. Durin, L. Herrera Diez, B. J. Hickey, A. Huxtable, C. Y. Hwang, G. Jakob, C. Kim, M. Kläui, J. Langer, C. H. Marrows, H. T. Nembach, D. Ravelosona, G. A. Riley, J. M. Shaw, V. Sokalski, S. Tacchi, M. Kuepferling

摘要:

不同的模型已被用来评估界面Dzyaloshinskiii-Moriya相互作用(ESTA)的非对称气泡膨胀方法,使用磁光学。在这里,我们调查最有前途的候选人在一系列不同的磁性多层膜垂直各向异性。基于标准蠕变假设的模型不能再现畴壁(DW)的速度分布时,DW粗糙度高。我们的结果表明,DW粗糙度和样品层的界面粗糙度相关。此外,我们给出了指导如何获得可靠的结果,该值与这种流行的方法。对相同样品的布里渊光散射(BLS)测量结果的比较表明,BLS方法往往会导致更高的测量值。

英文摘要:

Different models have been used to evaluate the interfacial Dzyaloshinskii-Moriya interaction (DMI) from the asymmetric bubble expansion method using magneto-optics. Here we investigate the most promising candidates over a range of different magnetic multilayers with perpendicular anisotropy. Models based on the standard creep hypothesis are not able to reproduce the domain wall (DW) velocity profile when the DW roughness is high. Our results demonstrate that the DW roughness and the interface roughness of the sample layers are correlated. Furthermore, we give guidance on how to obtain reliable results for the DMI value with this popular method. A comparison of the results with Brillouin light scattering (BLS) measurements on the same samples shows that the BLS approach often results in higher measured values of DMI.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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