Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation
Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation
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DOI：
10.1063/1.4883860
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发表时间：
2014-06-16
影响因子：
4
通讯作者：
Atkinson, D.
中科院分区：
文献类型：
--
作者：
King, J. A.;Ganguly, A.;Atkinson, D.
研究了界面混合对铁磁/非磁性双层薄膜皮秒磁化动力学的影响。利用低剂量聚焦离子束辐照，在10 nm的Ni81Fe19层和2-3 nm的Au或Cr2-3 nm盖层之间的界面上诱导混合。利用时间分辨磁光克尔效应研究了磁化动力学随离子束剂量的变化。在有Au帽的情况下，未辐照的双层膜的衰减与天然Ni81Fe19相当，并且随着离子剂量的增加而增加。而Ni81Fe19/Cr的阻尼值高于天然Ni81Fe19，但随着剂量的增加，其阻尼值降低。(C)2014 AIP出版有限责任公司。
The influence of interfacial intermixing on the picosecond magnetization dynamics of ferromagnetic/non-magnetic thin-film bilayers was studied. Low-dose focused-ion-beam irradiation was used to induce intermixing across the interface between a 10 nm Ni81Fe19 layer and a 2-3 nm capping layer of either Au or Cr. Time-resolved magneto-optical Kerr effect was used to study magnetization dynamics as a function of ion-beam dose. With an Au cap, the damping of the un-irradiated bilayer was comparable with native Ni81Fe19 and increased with increasing ion dose. In contrast, for Ni81Fe19/Cr the damping was higher than that for native Ni81Fe19, but the damping decreased with increasing dose. (C) 2014 AIP Publishing LLC.