第2回 物理工学科教室談話会(講師:Dr. Alexei Koshelev)


日 時:  2014年12月4日(木)15:00~(予定)
場 所: 工学部6号館1階大会議室(予定)
講 師: Dr. Alexei Koshelev (アルゴンヌ国立研究所)
題 目: Optimization of vortex pinning by metallic nanoparticles using large-scale numerical simulations

Introducing self-assembled nanoparticles into superconducting materials is a very efficient route to enhance their current-carrying capability.
We explore vortex pinning by randomly distributed metallic spherical Nanoparticles using large-scale numerical simulations of the time-dependent Ginzburg-Landau equations.
We found the optimal size and density of particles for which the highest Critical current realizes for fixed magnetic field.
For every particle size the critical current reaches maximum value at certain particle density, typically corresponding to 15-20% of the volume fraction filled by the particles. This optimal particle density somewhat increases with the magnetic field. Our results provide guidance for pinning optimization in practical superconductors.
紹介教員: 為ヶ井准教授、鹿野田教授