Increase of production rate of RE-123 film by PLD system with the hot-wall type heating

Abstract

We have studied two types of heating systems to produce thick GdBa 2Cu 3O 7− X (Gd123) films with high critical current ( I c) stably at a high speed by the PLD method. Material yields of both PLD systems reached about 50–60% by optimization of evaporation condition. Hot-wall heating type (type 2) could fabricate the thicker Gd123 film with the higher I c compared to contact heating type (type 1) and maximum I c reached 1040 A at about 6 μm thick. Furthermore, it was estimated that type 2 could fabricate Gd123 film with an I c of about 700 A at about twice speed compared to type 1. Finally, it was considered that the hot-wall heating type was very advantageous to prepare thick Gd123 film with high I c at a high speed from the system structure.