Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

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• 作者：Ruslan Salikhov ; Frank Brü ; ssing ; Katherine Gross ; Florin Radu ; Radu M. Abrudan and Hartmut Zabel
• 刊名：physica status solidi (b)
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：253
• 期：9
• 页码：1782-1787
• 全文大小：1455K
• ISSN：1521-3951

文摘

Sample inhomogeneities such as interface roughness, impurities, or crystal lattice dislocations can be the cause for two-magnon scattering in ferromagnetic thin films. Using an element specific time-resolved technique, we show experimentally that in Co2MnGe/Au/Ni81Fe19 trilayers the uniform magnetization precession in Ni81Fe19 (Py) layer can be influenced by magnetic stray fields emerging from the domain walls of micrometer size magnetic ripple domains in the Co2MnGe layer. We have found that these stray fields cause a phase shift of the transversal dynamic magnetization component of the precessional motion in the Py layer. We attribute the observed phase slip in precession to the two-magnon scattering process.