Enhanced Tc and strong flux pinning in melt-processed NdBa2Cu3Oy superconductors

Sang Im Yoo; Masato Murakami; Naomichi Sakai; Takamitsu Higuchi; Shoji Tanaka

doi:10.1143/JJAP.33.L1000

Enhanced T_c and strong flux pinning in melt-processed NdBa₂Cu₃O_y superconductors

Sang Im Yoo, Masato Murakami, Naomichi Sakai, Takamitsu Higuchi, Shoji Tanaka

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

162 Citations (Scopus)

Abstract

The effects of various oxygen partial pressures (P_O2) during melt processing on the superconducting properties of fabricated NdBa₂Cu₃O_y (Ndl23) superconductors have been systematically investigated. Unlike in air or O₂samples melt-processed in reduced oxygen atmospheres exhibited unprecedentedly high T_c’s of 95–96 K with a sharp superconducting transition. Especially, for a sample melt-processed in 0.1% O₂ in Ar, the magnetization hysteresis (M-H) loop was kept open up to 7 T at 77 K and for the field parallel to the c-axis of the sample (H//c), implying that very effective flux pinning can be achieved in high magnetic fields.

Original language	English
Pages (from-to)	L1000-L1003
Journal	Japanese Journal of Applied Physics
Volume	33
Issue number	7
DOIs	https://doi.org/10.1143/JJAP.33.L1000
Publication status	Published - 1994 Jul
Externally published	Yes

Keywords

Anomalous peak effect
Flux pinning
Melt process
NdBaCuO
NdBaCuO solid solutions
Oxygen partial pressure

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Enhanced Tc and strong flux pinning in melt-processed NdBa2Cu3Oy superconductors",

abstract = "The effects of various oxygen partial pressures (PO2) during melt processing on the superconducting properties of fabricated NdBa2Cu3Oy (Ndl23) superconductors have been systematically investigated. Unlike in air or O2samples melt-processed in reduced oxygen atmospheres exhibited unprecedentedly high Tc{\textquoteright}s of 95–96 K with a sharp superconducting transition. Especially, for a sample melt-processed in 0.1% O2 in Ar, the magnetization hysteresis (M-H) loop was kept open up to 7 T at 77 K and for the field parallel to the c-axis of the sample (H//c), implying that very effective flux pinning can be achieved in high magnetic fields.",

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AU - Yoo, Sang Im

AU - Murakami, Masato

AU - Sakai, Naomichi

AU - Higuchi, Takamitsu

AU - Tanaka, Shoji

PY - 1994/7

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AB - The effects of various oxygen partial pressures (PO2) during melt processing on the superconducting properties of fabricated NdBa2Cu3Oy (Ndl23) superconductors have been systematically investigated. Unlike in air or O2samples melt-processed in reduced oxygen atmospheres exhibited unprecedentedly high Tc’s of 95–96 K with a sharp superconducting transition. Especially, for a sample melt-processed in 0.1% O2 in Ar, the magnetization hysteresis (M-H) loop was kept open up to 7 T at 77 K and for the field parallel to the c-axis of the sample (H//c), implying that very effective flux pinning can be achieved in high magnetic fields.

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