Melt processing for obtaining NdBa2Cu3Oy superconductors with high Tc and large Jc

S. I. Yoo, N. Sakai, H. Takaichi, T. Higuchi, M. Murakami

Research output: Contribution to journalArticle

547 Citations (Scopus)

Abstract

A reduced oxygen atmosphere during melt processing turned out to be critical for the fabrication of NdBa2Cu3Oy (Nd123) superconductors possessing high superconducting transition temperature (Tc) with a sharp transition and large critical current density (Jc) at 77 K. In a dc magnetization measurement, Nd123 superconductors melt processed in flowing a mixture gas of 1% O2 in Ar exhibited the Tc of about 95 K and the transition width of 1.5 K with the applied field of 10 Oe. A four-probe measurement showed the zero resistive transition Tc (R=0) of about 95 K. An anomalous peak effect in the magnetization hysteresis (M-H) loops was commonly observed and lead to large magnetic Jc of 2×104 A/cm2 at 77 K and 2 T for the applied field H parallel to the c axis of a sample (H∥c). This achievement is attributable to a preferential formation of high T c phase (x<0.1) among the Nd1+xBa2-xCu 3Oy solid solutions in a reduced oxygen atmosphere.

Original languageEnglish
Pages (from-to)633-635
Number of pages3
JournalApplied Physics Letters
Volume65
Issue number5
DOIs
Publication statusPublished - 1994 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Melt processing for obtaining NdBa<sub>2</sub>Cu<sub>3</sub>O<sub>y</sub> superconductors with high T<sub>c</sub> and large J<sub>c</sub>'. Together they form a unique fingerprint.

  • Cite this