Critical currents of OCMG processed Nd123 crystals

T. Higuchi; S. I. Yoo; K. Sawada; N. Sakai; M. Murakami

doi:10.1016/0921-4534(96)00154-2

Critical currents of OCMG processed Nd123 crystals

T. Higuchi, S. I. Yoo, K. Sawada, N. Sakai, M. Murakami

Research output: Contribution to journal › Article › peer-review

1 Citation (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 (T_c) 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-T_c phases. The sample exhibited high critical current density (J_c) 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 language	English
Pages (from-to)	396-400
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(96)00154-2
Publication status	Published - 1996 May
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/0921-4534(96)00154-2

Cite this

@article{c6bd655a9176492dad2ee0047b488f5a,

title = "Critical currents of OCMG processed Nd123 crystals",

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.",

author = "T. Higuchi and Yoo, {S. I.} and K. Sawada and N. Sakai and M. Murakami",

year = "1996",

month = may,

doi = "10.1016/0921-4534(96)00154-2",

language = "English",

volume = "263",

pages = "396--400",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Critical currents of OCMG processed Nd123 crystals

AU - Higuchi, T.

AU - Yoo, S. I.

AU - Sawada, K.

AU - Sakai, N.

AU - Murakami, M.

PY - 1996/5

Y1 - 1996/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0030147826&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030147826&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(96)00154-2

DO - 10.1016/0921-4534(96)00154-2

M3 - Article

AN - SCOPUS:0030147826

SN - 0921-4534

VL - 263

SP - 396

EP - 400

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

ER -

Critical currents of OCMG processed Nd123 crystals

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this