2012/12/12 歡迎 中央研究院物理所 李偉立 博士 蒞臨演講，講題：Size Effect in Nano-structured Thin Films Fabricated Using A Monolayer Polymer/Nanosphere Hybrid

本週邀請到 中央研究院物理所 李偉立 博士 進行專題演講
題目：Size Effect in Nano-structured Thin Films Fabricated Using A Monolayer Polymer/Nanosphere Hybrid
時間：2012/12/12 15:20-17:20
地點：NE69

摘要：
We have developed a method to prepare a large area monolayer of polymer/nanosphere hybrid at a water-air interface, which was used to fabricate large area well-ordered nano-antidot thin films. By tuning the antidot diameter, the size effect on its transport and magnetic property can be investigated quantitatively. We have fabricated series of ferromagnetic (FM) cobalt antidot thin films and also superconducting (SC) niobium antidot thin films with different antidot diameters. For FM antidot thin films, we uncovered an interesting crossover behavior in magnetization reversal process as the film size crosses over the length scale of the domain wall width. In SC antidot thin films, we observed oscillations in both magnetization and resistance with respect to a perpendicular magnetic field, which is reminiscent of the Little-Parks experiment in a thin-walled SC cylinder. Detailed size effect on the supercurrent screening will be discussed.

歡迎各位同學踴躍參與