Magnetic properties of Co/Pt multilayers on self-assembled particle arrays
Magnetic properties of Co/Pt multilayers on self-assembled particle arrays
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DOI：
10.1063/1.3003064
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发表时间：
2008-10-15
影响因子：
3.2
通讯作者：
Albrecht, M.
中科院分区：
文献类型：
--
作者：
Ulbrich, T. C.;Assmann, D.;Albrecht, M.
将一系列具有不同Co层厚度的[Co（x）/Pt（0.8 nm）]（8）多层膜沉积到粒径小至58 nm的自组装颗粒单层膜上，形成磁性纳米结构阵列。对于所有颗粒尺寸，对于0.3 nm的Co层厚度观察到最大的面外结晶度，其随着Co层厚度的进一步增加而减小，表明在约0.8 nm Co层厚度处易轴取向从垂直于膜平面的过渡。虽然单畴状态是最有利的状态垂直退磁后的Co层厚度为0.4 nm的所有颗粒尺寸，更大的Co层厚度揭示了多畴状态。此外，还系统地研究了这些磁性纳米结构的磁化反转行为和畴结构。在0.4nm Co层厚度的交叉厚度处，通过在75度的临界角下施加磁场，可以诱导320 nm颗粒的两畴配置。(C)2008年美国物理学会。[DOI：10.1063/1.3003064]
A series of [Co(x)/Pt(0.8 nm)](8) multilayers with varying individual Co layer thickness was deposited onto self-assembled particle monolayers with particle sizes as small as 58 nm forming arrays of magnetic nanostructures. A maximal out-of-plane coercivity was observed for a Co layer thickness of 0.3 nm for all particle sizes, which decreases with further increasing Co layer thickness indicating a transition of the easy axis orientation from perpendicular to the film plane at about 0.8 nm Co layer thickness. While a single-domain state is the most favorable state after perpendicular demagnetization for a Co layer thickness of up to 0.4 nm for all particle sizes, greater Co layer thicknesses reveal a multidomain state. In addition, the angle dependent magnetization reversal behavior and the domain configurations of these magnetic nanostructures were investigated systematically. At the crossover thickness of 0.4 nm Co layer thickness, a two-domain configuration can be induced for 320 nm particles by applying a magnetic field under a critical angle of 75 degrees. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3003064]