Structural and magnetic properties of CoO/Co thin films deposited onto self-assembled polystyrene nanospheres (600nm)

The structural and magnetic properties of CoO/Co nanocaps prepared by electron beam evaporation technique as a function of Cothickness [ultra-thin (10 nm) and thick (100 nm)] films are presented. These films were deposited on PS (Polystyrene) nanospheres (600nm diameter) self-assembledon Si (100) su...

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Bibliographic Details
Main Authors: Kumar, Y., Tripathi, J., Kumar, D., Gupta, P., Tripathi, S., Sharma, A.
Format: Conference Proceeding
Language:English
Subjects:
Coercivity
Comparative studies
Curvature
Diameters
Electron beams
Film thickness
Magnetic properties
Magnetism
Morphology
Nanospheres
Optical properties
Polystyrene resins
Self-assembly
Silicon substrates
Thick films
Thin films
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Summary:The structural and magnetic properties of CoO/Co nanocaps prepared by electron beam evaporation technique as a function of Cothickness [ultra-thin (10 nm) and thick (100 nm)] films are presented. These films were deposited on PS (Polystyrene) nanospheres (600nm diameter) self-assembledon Si (100) substrate through nanosphere lithography. For a comparative study, these films were also deposited on plane Si substrateunder same deposition conditions. While Scanning electron microscopy showed the morphology and uniform distribution of nanospheres, corresponding roughness and thickness of the thin films on bare substrate were calculated using X-ray reflectivity technique. in which changes in XRR oscillations with film thickness have been observed. Magnetic properties were investigated using magneto optical Kerr effectwhich show enhancement in coercivity with increase in film thickness. The results are interpreted in terms of nanosphere curvature resulting in the variation in film thickness across this curvature.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0016713