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)

Access to Document

10.1143/JJAP.33.L1000

Cite this

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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.",

keywords = "Anomalous peak effect, Flux pinning, Melt process, NdBaCuO, NdBaCuO solid solutions, Oxygen partial pressure",

author = "Yoo, {Sang Im} and Masato Murakami and Naomichi Sakai and Takamitsu Higuchi and Shoji Tanaka",

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T1 - Enhanced Tc and strong flux pinning in melt-processed NdBa2Cu3Oy superconductors

AU - Yoo, Sang Im

AU - Murakami, Masato

AU - Sakai, Naomichi

AU - Higuchi, Takamitsu

AU - Tanaka, Shoji

PY - 1994/7

Y1 - 1994/7

N2 - 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.

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.

KW - Anomalous peak effect

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KW - Oxygen partial pressure

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