Significant enhancement of critical current density in Gly-doped MgB 2 bulk by tailoring the formation of MgO

Qi Cai; Yongchang Liu; Zongqing Ma; Liming Yu

doi:10.1016/j.scriptamat.2012.03.029

Significant enhancement of critical current density in Gly-doped MgB ₂ bulk by tailoring the formation of MgO

Qi Cai
, Yongchang Liu^*
, Zongqing Ma
, Liming Yu

^*Corresponding author for this work

Tianjin University

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

14 Citations (Scopus)

Abstract

A significant enhancement of critical current density (J _c) was obtained in MgB ₂ + 3 wt.% glycine samples with a large amount of MgO. The improvements in J _c and in the irreversible magnetic field (H _irr) are attributed to the pinning effects of high C-substitution level, nanoscale MgO, and to the even boundaries of small grains. This doping method overcomes the degradation of J _c under a low field in previously reported SiC-doped samples. Moreover, the formation of MgO was demonstrated to be the result of the reactions between Mg, CO ₂ and O ₂.

Original language	English
Pages (from-to)	92-95
Number of pages	4
Journal	Scripta Materialia
Volume	67
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2012.03.029
Publication status	Published - Jul 2012
Externally published	Yes

Keywords

C-doping
Critical current density
Glycine
MgB superconductor
MgO

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10.1016/j.scriptamat.2012.03.029

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title = "Significant enhancement of critical current density in Gly-doped MgB 2 bulk by tailoring the formation of MgO",

abstract = "A significant enhancement of critical current density (J c) was obtained in MgB 2 + 3 wt.\% glycine samples with a large amount of MgO. The improvements in J c and in the irreversible magnetic field (H irr) are attributed to the pinning effects of high C-substitution level, nanoscale MgO, and to the even boundaries of small grains. This doping method overcomes the degradation of J c under a low field in previously reported SiC-doped samples. Moreover, the formation of MgO was demonstrated to be the result of the reactions between Mg, CO 2 and O 2.",

keywords = "C-doping, Critical current density, Glycine, MgB superconductor, MgO",

author = "Qi Cai and Yongchang Liu and Zongqing Ma and Liming Yu",

year = "2012",

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T1 - Significant enhancement of critical current density in Gly-doped MgB 2 bulk by tailoring the formation of MgO

AU - Cai, Qi

AU - Liu, Yongchang

AU - Ma, Zongqing

AU - Yu, Liming

PY - 2012/7

Y1 - 2012/7

N2 - A significant enhancement of critical current density (J c) was obtained in MgB 2 + 3 wt.% glycine samples with a large amount of MgO. The improvements in J c and in the irreversible magnetic field (H irr) are attributed to the pinning effects of high C-substitution level, nanoscale MgO, and to the even boundaries of small grains. This doping method overcomes the degradation of J c under a low field in previously reported SiC-doped samples. Moreover, the formation of MgO was demonstrated to be the result of the reactions between Mg, CO 2 and O 2.

AB - A significant enhancement of critical current density (J c) was obtained in MgB 2 + 3 wt.% glycine samples with a large amount of MgO. The improvements in J c and in the irreversible magnetic field (H irr) are attributed to the pinning effects of high C-substitution level, nanoscale MgO, and to the even boundaries of small grains. This doping method overcomes the degradation of J c under a low field in previously reported SiC-doped samples. Moreover, the formation of MgO was demonstrated to be the result of the reactions between Mg, CO 2 and O 2.

KW - C-doping

KW - Critical current density

KW - Glycine

KW - MgB superconductor

KW - MgO

UR - https://www.scopus.com/pages/publications/84861186065

U2 - 10.1016/j.scriptamat.2012.03.029

DO - 10.1016/j.scriptamat.2012.03.029

M3 - Article

AN - SCOPUS:84861186065

SN - 1359-6462

VL - 67

SP - 92

EP - 95

JO - Scripta Materialia

JF - Scripta Materialia

IS - 1

ER -

Significant enhancement of critical current density in Gly-doped MgB ₂ bulk by tailoring the formation of MgO

Abstract

Keywords

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