PrBa2 (Cu0.8Al0.2)(3)O-7 thin film surface smoothing by Ar-cluster ion beam bombardment
MelvilleDOI: 10.1063/1.1619818 Publisher: Amer Inst Physics, pp.731-734
Al doped PrBa2Cu3O7 epitaxial thin film is an excellent insulating material for oxide superconducting junction application. The surface of such films grown at high temperature is usually very rough and requires smoothing during device fabrication. A gas cluster ion beam is a good tool for smoothing the surface down to the sub-manometer level. In this paper, PrBa2(Cu0.8Al0.2)(3)O-7 thin films of different thickness grown by Pulsed Laser Deposition (PLD) were irradiated with a 20 keV Ar-cluster ion beam. The average size of the Ar-clusters was about 3000 atoms per cluster. A film thickness varying from 48 nm to 920 nm with corresponding initial roughness of 2 nm to 10 nm was studied. The roughness was gradually reduced with increasing cluster ion dosage, reaching an ultimate of 0.7 nm. For a sample of average sputtering yield, surface damage and the annealing effect after smoothing were also studied.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.