Flux Pinning and Superconducting Properties of Bulk MgB2 with MgB4 Addition

Muralidhar Miryala; Sai Srikanth Arvapalli; Pavel Diko; Milos Jirsa; Masato Murakami

doi:10.1002/adem.201900750

Flux Pinning and Superconducting Properties of Bulk MgB₂ with MgB₄ Addition

Muralidhar Miryala, Sai Srikanth Arvapalli, Pavel Diko, Milos Jirsa, Masato Murakami

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

10 Citations (Scopus)

Abstract

The improved performance of bulk MgB₂ material with added nanometer-sized MgB₄ particles is presented. Bulk polycrystalline MgB₂ samples with varying amount of MgB₄ x (x = 0, 1, 2, 3, 4, 5, and 10 wt%) are fabricated by solid-state sintering at 775 °C for 3 h in pure argon gas. Microstructural studies indicate formation of nanometer-sized grains when MgB₄ is added. Density of nano-grains is inversely proportional to the MgB₄ content. The MgB₂ sample with 1 wt% of MgB₄ shows the best performance, with its self-field critical current density reaching 385 and 315 kAcm⁻² at 15 and 20 K, respectively. Flux pinning diagrams reveal the domination of grain boundary pinning mechanism.

Original language	English
Article number	1900750
Journal	Advanced Engineering Materials
Volume	22
Issue number	3
DOIs	https://doi.org/10.1002/adem.201900750
Publication status	Published - 2020 Mar 1

Keywords

MgB
MgB
flux pinning
grain refinement
improved J

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1002/adem.201900750

Cite this

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title = "Flux Pinning and Superconducting Properties of Bulk MgB2 with MgB4 Addition",

abstract = "The improved performance of bulk MgB2 material with added nanometer-sized MgB4 particles is presented. Bulk polycrystalline MgB2 samples with varying amount of MgB4 x (x = 0, 1, 2, 3, 4, 5, and 10 wt%) are fabricated by solid-state sintering at 775 °C for 3 h in pure argon gas. Microstructural studies indicate formation of nanometer-sized grains when MgB4 is added. Density of nano-grains is inversely proportional to the MgB4 content. The MgB2 sample with 1 wt% of MgB4 shows the best performance, with its self-field critical current density reaching 385 and 315 kAcm−2 at 15 and 20 K, respectively. Flux pinning diagrams reveal the domination of grain boundary pinning mechanism.",

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author = "Muralidhar Miryala and Arvapalli, {Sai Srikanth} and Pavel Diko and Milos Jirsa and Masato Murakami",

note = "Funding Information: This work was partly supported by Shibaura Institute of Technology (SIT) Research Center for Green Innovation and Grant-in-Aid FD research budget code: 112282. One of the authors (S.S.A.) acknowledges the financial support from SIT for his doctoral program. Funding Information: This work was partly supported by Shibaura Institute of Technology (SIT) Research Center for Green Innovation and Grant‐in‐Aid FD research budget code: 112282. One of the authors (S.S.A.) acknowledges support from SIT for providing the financial support for the doctoral program. Publisher Copyright: {\textcopyright} 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2020",

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AU - Arvapalli, Sai Srikanth

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AU - Jirsa, Milos

AU - Murakami, Masato

N1 - Funding Information: This work was partly supported by Shibaura Institute of Technology (SIT) Research Center for Green Innovation and Grant-in-Aid FD research budget code: 112282. One of the authors (S.S.A.) acknowledges the financial support from SIT for his doctoral program. Funding Information: This work was partly supported by Shibaura Institute of Technology (SIT) Research Center for Green Innovation and Grant‐in‐Aid FD research budget code: 112282. One of the authors (S.S.A.) acknowledges support from SIT for providing the financial support for the doctoral program. Publisher Copyright: © 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2020/3/1

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N2 - The improved performance of bulk MgB2 material with added nanometer-sized MgB4 particles is presented. Bulk polycrystalline MgB2 samples with varying amount of MgB4 x (x = 0, 1, 2, 3, 4, 5, and 10 wt%) are fabricated by solid-state sintering at 775 °C for 3 h in pure argon gas. Microstructural studies indicate formation of nanometer-sized grains when MgB4 is added. Density of nano-grains is inversely proportional to the MgB4 content. The MgB2 sample with 1 wt% of MgB4 shows the best performance, with its self-field critical current density reaching 385 and 315 kAcm−2 at 15 and 20 K, respectively. Flux pinning diagrams reveal the domination of grain boundary pinning mechanism.

AB - The improved performance of bulk MgB2 material with added nanometer-sized MgB4 particles is presented. Bulk polycrystalline MgB2 samples with varying amount of MgB4 x (x = 0, 1, 2, 3, 4, 5, and 10 wt%) are fabricated by solid-state sintering at 775 °C for 3 h in pure argon gas. Microstructural studies indicate formation of nanometer-sized grains when MgB4 is added. Density of nano-grains is inversely proportional to the MgB4 content. The MgB2 sample with 1 wt% of MgB4 shows the best performance, with its self-field critical current density reaching 385 and 315 kAcm−2 at 15 and 20 K, respectively. Flux pinning diagrams reveal the domination of grain boundary pinning mechanism.

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