In-Situ Processing of Thin Films and Coated Wires of Novel High-Tc Superconductors

本文研究了在Y-Ba-Cu-0基体系中加入Bi、Tl和/或Sr的几种高Tc超导材料的薄膜和涂层的形成。纳秒激光蒸发技术和快速热加工方法将用于稳定这些非平衡相。使用这些加工方法可以增加Cu-O平面的数量，从而提高超导转变温度Tc。激光蒸发的建模将被执行，以了解和控制沉积过程，并尽量减少总热预算在原位沉积和随后的退火。将详细研究薄膜的外延生长和织构以最大化临界电流密度。

This work studies the formation of thin films and coatings of several high Tc Superconducting materials in the Y-Ba-Cu-0 base system with Bi, Tl and/or Sr additions. Nanosecond laser evaporation techniques and rapid thermal processing methods will be used to stabilize these non-equilibrium phases. Using these processing methods the number of Cu-O planes may be increased which also increases the superconducting transition temperature Tc. Modeling of the laser evaporation will be performed to understand and control the deposition process and to minimize the total thermal budget during in-situ deposition and subsequent annealing. The epitaxial growth and texturing of thin films to maximize critical current densities wil be investigated in detail.