Enhancement of critical current density in glycine-doped MgB 2 bulks

Qi Cai; Zongqing Ma; Yongchang Liu; Liming Yu

doi:10.1016/j.matchemphys.2012.07.056

Enhancement of critical current density in glycine-doped MgB ₂ bulks

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

^*Corresponding author for this work

Tianjin University

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

12 Citations (Scopus)

Abstract

Samples of MgB ₂ + x wt% glycine (with x = 0, 2, 5 and 8) were sintered at 800 °C for 30 min. Obvious enhancement of critical current density (J _c) over the entire field was obtained in 5 wt% glycine-doped sample, indicating that grain connectivity and pinning effect were both improved. The improvement of J _c was attributed to the pinning effect by C substitution, MgO nano-particles, and relatively smaller MgB ₂ grains. Besides, 2 wt% glycine could only improve J _c at low field, while excessive glycine (above 5 wt%) would lead to unfavorable J _c performance.

Original language	English
Pages (from-to)	778-782
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	136
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2012.07.056
Publication status	Published - 15 Oct 2012
Externally published	Yes

Keywords

Electron microscopy
Sintering
Superconductivity
Superconductors

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10.1016/j.matchemphys.2012.07.056

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title = "Enhancement of critical current density in glycine-doped MgB 2 bulks",

abstract = "Samples of MgB 2 + x wt\% glycine (with x = 0, 2, 5 and 8) were sintered at 800 °C for 30 min. Obvious enhancement of critical current density (J c) over the entire field was obtained in 5 wt\% glycine-doped sample, indicating that grain connectivity and pinning effect were both improved. The improvement of J c was attributed to the pinning effect by C substitution, MgO nano-particles, and relatively smaller MgB 2 grains. Besides, 2 wt\% glycine could only improve J c at low field, while excessive glycine (above 5 wt\%) would lead to unfavorable J c performance.",

keywords = "Electron microscopy, Sintering, Superconductivity, Superconductors",

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

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doi = "10.1016/j.matchemphys.2012.07.056",

language = "English",

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journal = "Materials Chemistry and Physics",

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TY - JOUR

T1 - Enhancement of critical current density in glycine-doped MgB 2 bulks

AU - Cai, Qi

AU - Ma, Zongqing

AU - Liu, Yongchang

AU - Yu, Liming

PY - 2012/10/15

Y1 - 2012/10/15

N2 - Samples of MgB 2 + x wt% glycine (with x = 0, 2, 5 and 8) were sintered at 800 °C for 30 min. Obvious enhancement of critical current density (J c) over the entire field was obtained in 5 wt% glycine-doped sample, indicating that grain connectivity and pinning effect were both improved. The improvement of J c was attributed to the pinning effect by C substitution, MgO nano-particles, and relatively smaller MgB 2 grains. Besides, 2 wt% glycine could only improve J c at low field, while excessive glycine (above 5 wt%) would lead to unfavorable J c performance.

AB - Samples of MgB 2 + x wt% glycine (with x = 0, 2, 5 and 8) were sintered at 800 °C for 30 min. Obvious enhancement of critical current density (J c) over the entire field was obtained in 5 wt% glycine-doped sample, indicating that grain connectivity and pinning effect were both improved. The improvement of J c was attributed to the pinning effect by C substitution, MgO nano-particles, and relatively smaller MgB 2 grains. Besides, 2 wt% glycine could only improve J c at low field, while excessive glycine (above 5 wt%) would lead to unfavorable J c performance.

KW - Electron microscopy

KW - Sintering

KW - Superconductivity

KW - Superconductors

UR - http://www.scopus.com/inward/record.url?scp=84867405118&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2012.07.056

DO - 10.1016/j.matchemphys.2012.07.056

M3 - Article

AN - SCOPUS:84867405118

SN - 0254-0584

VL - 136

SP - 778

EP - 782

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Enhancement of critical current density in glycine-doped MgB ₂ bulks

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Keywords

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