Magnetic states in low-pinning high-anisotropy material nanostructures suitable for dynamic imaging
Magnetic states in low-pinning high-anisotropy material nanostructures suitable for dynamic imaging
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DOI：
10.1103/physrevb.87.134422
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发表时间：
2013-04-26
影响因子：
3.7
通讯作者：
Klaeui, M.
中科院分区：
文献类型：
--
作者：
Buettner, Felix;Moutafis, C.;Klaeui, M.
我们目前的磁畴状态的材料配置具有高（垂直）磁各向异性，特别是低磁钉扎。这种材料是一种B掺杂的Co/Pt多层结构，在X射线透射实验中表现出很强的磁对比度，使其适合于现代同步加速器技术的动态成像，同时提供高空间和高时间分辨率。通过分析静态自旋结构的纳米盘在可变的外部领域，我们表明，CoB/Pt多层膜表现出足够低的域壁钉扎操纵域图案与弱刺激，特别是移动域和域壁。我们证明了在一个原理验证实验中使用泵探测X射线全息成像，适度的磁场可以诱导弹性和确定性，因此可重复的小变化的域配置在CoB/Pt多层膜，这是关键执行高分辨率成像的域壁运动，以获得洞察局部磁化动力学的细节。DOI：10.1103/PhysRevB.87.134422
We present magnetic domain states in a material configuration with high (perpendicular) magnetic anisotropy and particularly low magnetic pinning. This material, a B-doped Co/Pt multilayer configuration, exhibits a strong magnetic contrast in x-ray transmission experiments, making it apt for dynamic imaging with modern synchrotron techniques, providing high spatial and high temporal resolution simultaneously. By analyzing the static spin structures in nanodisks at variable external fields, we show that CoB/Pt multilayers exhibit low enough domain wall pinning to manipulate the domain pattern with weak stimuli and in particular to move domains and domain walls. We demonstrate in a proof-of-principle experiment using pump-probe x-ray holographic imaging that moderate magnetic fields can induce elastic and deterministic and hence repeatable small variations of the domain configuration in CoB/Pt multilayers, which is the key to perform high-resolution imaging of the domain wall motion to gain insight to the details of the local magnetization dynamics. DOI: 10.1103/PhysRevB.87.134422