How to Optimize Critical Current Performance of RE123 Materials by Controlling Oxygen Content

Abstract

Oxygen nonstoichiometry behaviors of REBa2Cu3Oy (RE123: RE= Nd, Sm, Eu, Gd, Dy. Ho and Y) compounds have been precisely determined by the thermogravimetric measurements. Dependence of oxygen content on temperature and oxygen partial pressure were found to slightly depend on the RE element. Thermodynamic quantities of oxygen, such as hO2 and sO2, also varied with RE element. Relationship between Tc and oxygen content is strongly dependent on the RE species. This suggests that pinnig effect due to the oxygen defects is different in each RE123 compound and, therefore, critical current properties of RE123 must be optimized by precise control of oxygen content as well as selection of suitable RE elements.

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Correspondence to Jun-ichi Shimoyama.

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Shimoyama, Ji., Horii, S., Otzschi, K. et al. How to Optimize Critical Current Performance of RE123 Materials by Controlling Oxygen Content. MRS Online Proceedings Library 689, 818 (2001). https://doi.org/10.1557/PROC-689-E8.18

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