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


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.

This is a preview of subscription content, access via your institution.


  1. 1.

    For example; K. Kishio et al., Jpn. J. Appl. Phys. 26, L1226 (1987)

    Article  Google Scholar 

  2. 1a.

    T. B. Lindemer et al., J. Am. Ceram. Soc. 72, 1775 (1989).

    CAS  Article  Google Scholar 

  3. 2.

    H. Kupfer, A. A. Zhukov, A. Will, W. Jahn, R. Meier-Hirmer, T. Wolf, V. I. Voronkova, M. Klaser and K. Saito, Phys Rev. B54, 644 (1996).

    Article  Google Scholar 

  4. 3.

    T. Kagiyama, J. Shimoyama, K. D. Otzschi, K. Kishio, K. Kitazawa, N. Chikumoto and M. Murakami, Physica C341-348, 1445 (2000).

    Article  Google Scholar 

  5. 4.

    M. Murakami, S. I. Yoo, T. Higuchi, N. Sakai, M. Watabiki, N. Koshizuka and S. Tanaka, Physica C235-240, 2781 (1994).

    Article  Google Scholar 

  6. 5.

    H. Suematsu, H. Okamura, S. Nagaya and H. Yamauchi, Supercond. Sci. Technol. 12, 274 (1999).

    CAS  Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Jun-ichi Shimoyama.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

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).

Download citation