Critical currents of OCMG processed Nd123 crystals

T. Higuchi, S. I. Yoo, K. Sawada, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Critical current densities of Nd123 crystals flux grown by the oxygen-controlled-melt-growth (OCMG) process have been studied with DC magnetization measurements. The superconducting transition temperature (Tc) of the Nd123 crystal flux grown in 0.1%O2-Ar gas was 94 K with the applied field of 10 Oe parallel to the c-axis. The sample was found to be homogeneous without weakly linked regions through magneto-optical measurements. DC magnetization-hysteresis curves measured with a SQUID magnetometer exhibited a peak effect at various temperatures above 70 K. The peak effect is attributable to field-induced pinning by finely distributed low-Tc phases. The sample exhibited high critical current density (Jc) values of 4 × 104 A/cm2 in 2 T and over 1 × 104 A/cm2 in 4 T at 77 K for fields parallel to the c-axis.

Original languageEnglish
Pages (from-to)396-400
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume263
Issue number1-4
Publication statusPublished - 1996 May
Externally publishedYes

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Critical currents
Magnetization
critical current
direct current
Critical current density (superconductivity)
current density
Oxygen
Fluxes
magnetization
Crystals
SQUIDs
oxygen
Magnetometers
optical measurement
magnetometers
Superconducting transition temperature
crystals
Hysteresis
Gases
transition temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Critical currents of OCMG processed Nd123 crystals. / Higuchi, T.; Yoo, S. I.; Sawada, K.; Sakai, Naomichi; Murakami, Masato.

In: Physica C: Superconductivity and its Applications, Vol. 263, No. 1-4, 05.1996, p. 396-400.

Research output: Contribution to journalArticle

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