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

S. I. Yoo, Naomichi Sakai, H. Takaichi, T. Higuchi, Masato Murakami

Research output: Contribution to journalArticle

545 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
Externally publishedYes

Fingerprint

atmospheres
magnetization
oxygen
gas mixtures
critical current
solid solutions
transition temperature
hysteresis
current density
fabrication
probes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Melt processing for obtaining NdBa2Cu3Oy superconductors with high Tc and large Jc. / Yoo, S. I.; Sakai, Naomichi; Takaichi, H.; Higuchi, T.; Murakami, Masato.

In: Applied Physics Letters, Vol. 65, No. 5, 1994, p. 633-635.

Research output: Contribution to journalArticle

@article{eb5e3d722bbc42c599db8e3b34114efa,
title = "Melt processing for obtaining NdBa2Cu3Oy superconductors with high Tc and large Jc",
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.",
author = "Yoo, {S. I.} and Naomichi Sakai and H. Takaichi and T. Higuchi and Masato Murakami",
year = "1994",
doi = "10.1063/1.112254",
language = "English",
volume = "65",
pages = "633--635",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Melt processing for obtaining NdBa2Cu3Oy superconductors with high Tc and large Jc

AU - Yoo, S. I.

AU - Sakai, Naomichi

AU - Takaichi, H.

AU - Higuchi, T.

AU - Murakami, Masato

PY - 1994

Y1 - 1994

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0347006466&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0347006466&partnerID=8YFLogxK

U2 - 10.1063/1.112254

DO - 10.1063/1.112254

M3 - Article

AN - SCOPUS:0347006466

VL - 65

SP - 633

EP - 635

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 5

ER -