Anomalous grazing-incidence small-angle X-ray scattering investigation on the surface morphology of an FePt magnetic nanoparticle monolayer on functional modulated substrates

作者：Huang Tzu Wen; Yu Kuan Li; Liao Yen Fa; Lee Chih Hao^*

来源：Journal of Applied Crystallography, 2007, 40: S480-S484.

DOI：10.1107/S0021889807005390

The structural stability and coalescence of self-assembled FePt monolayer nanoparticles on functional substrates with/without an Au overlayer during annealing were studied. From X-ray diffraction and the anomalous grazing-incidence small-angle X-ray scattering techniques, the nanoparticles were found to be intact under the annealing process when a 5-10 nm overlayer of Au was deposited on top of FePt monolayer nanoparticles. From the simulation result, the particle size 4.5 +/- 0.5 nm is typically unchanged, but the distance between particles is reduced from 7.5 +/- 1.5 nm to 5.5 +/- 1.1 nm after annealing. The results suggest that the 5 nm Au coverlayer is an effective diffusing barrier layer to prevent the FePt nanoparticles from sintering during the annealing process.

• 出版日期2007-4
• 单位清华大学