Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2

J. Ishiwata, Muralidhar Miryala, Kazuo Inoue, Masato Murakami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The objective of this work is to improve the flux pinning performance of bulk MgB2 superconductors by dispersing nanometer-sized MgB4 particles. The high quality MgB4 material was produced, and the MgO rest in the powder was removed by HNO3 (1 M) leaching. Several bulk polycrystalline samples were fabricated by means of the solid state reaction method with compositions MgB2 + x wt% of MgB4 (x=0, 2, 5, and 10) at 775oC in pure argon atmosphere. X-ray diffraction indicated single phase and homogenous MgB2 bulks when MgB4 content was below 5wt%. The superconducting transitions were sharp at low MgB4 concentrations. The critical current density, Jc, depend on the MgB4 content in the MgB2 composite. The MgB2 sample with 2wt% of MgB4 processed at 775oC for 3 h showed the critical current density of 300 kA cm-2 at 20 K in self field.

Original languageEnglish
Title of host publicationPhysics Procedia
PublisherElsevier
Pages69-72
Number of pages4
Volume65
DOIs
Publication statusPublished - 2015
Event27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan
Duration: 2014 Nov 252014 Nov 27

Other

Other27th International Symposium on Superconductivity, ISS 2014
CountryJapan
CityTokyo
Period14/11/2514/11/27

Fingerprint

critical current
current density
flux pinning
dispersing
leaching
low concentrations
argon
solid state
atmospheres
composite materials
diffraction
x rays

Keywords

  • critical current density
  • flux pinning
  • magnetization measurements
  • MgB
  • MgB
  • X-ray diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2 . / Ishiwata, J.; Miryala, Muralidhar; Inoue, Kazuo; Murakami, Masato.

Physics Procedia. Vol. 65 Elsevier, 2015. p. 69-72.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ishiwata, J, Miryala, M, Inoue, K & Murakami, M 2015, Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2 in Physics Procedia. vol. 65, Elsevier, pp. 69-72, 27th International Symposium on Superconductivity, ISS 2014, Tokyo, Japan, 14/11/25. https://doi.org/10.1016/j.phpro.2015.05.124
Ishiwata, J. ; Miryala, Muralidhar ; Inoue, Kazuo ; Murakami, Masato. / Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2 Physics Procedia. Vol. 65 Elsevier, 2015. pp. 69-72
@inproceedings{c4aa2b30a17d4097adab988d33e568c3,
title = "Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2",
abstract = "The objective of this work is to improve the flux pinning performance of bulk MgB2 superconductors by dispersing nanometer-sized MgB4 particles. The high quality MgB4 material was produced, and the MgO rest in the powder was removed by HNO3 (1 M) leaching. Several bulk polycrystalline samples were fabricated by means of the solid state reaction method with compositions MgB2 + x wt{\%} of MgB4 (x=0, 2, 5, and 10) at 775oC in pure argon atmosphere. X-ray diffraction indicated single phase and homogenous MgB2 bulks when MgB4 content was below 5wt{\%}. The superconducting transitions were sharp at low MgB4 concentrations. The critical current density, Jc, depend on the MgB4 content in the MgB2 composite. The MgB2 sample with 2wt{\%} of MgB4 processed at 775oC for 3 h showed the critical current density of 300 kA cm-2 at 20 K in self field.",
keywords = "critical current density, flux pinning, magnetization measurements, MgB, MgB, X-ray diffraction",
author = "J. Ishiwata and Muralidhar Miryala and Kazuo Inoue and Masato Murakami",
year = "2015",
doi = "10.1016/j.phpro.2015.05.124",
language = "English",
volume = "65",
pages = "69--72",
booktitle = "Physics Procedia",
publisher = "Elsevier",

}

TY - GEN

T1 - Effect of MgB4 Addition on the Superconducting Properties of Polycrystalline MgB2

AU - Ishiwata, J.

AU - Miryala, Muralidhar

AU - Inoue, Kazuo

AU - Murakami, Masato

PY - 2015

Y1 - 2015

N2 - The objective of this work is to improve the flux pinning performance of bulk MgB2 superconductors by dispersing nanometer-sized MgB4 particles. The high quality MgB4 material was produced, and the MgO rest in the powder was removed by HNO3 (1 M) leaching. Several bulk polycrystalline samples were fabricated by means of the solid state reaction method with compositions MgB2 + x wt% of MgB4 (x=0, 2, 5, and 10) at 775oC in pure argon atmosphere. X-ray diffraction indicated single phase and homogenous MgB2 bulks when MgB4 content was below 5wt%. The superconducting transitions were sharp at low MgB4 concentrations. The critical current density, Jc, depend on the MgB4 content in the MgB2 composite. The MgB2 sample with 2wt% of MgB4 processed at 775oC for 3 h showed the critical current density of 300 kA cm-2 at 20 K in self field.

AB - The objective of this work is to improve the flux pinning performance of bulk MgB2 superconductors by dispersing nanometer-sized MgB4 particles. The high quality MgB4 material was produced, and the MgO rest in the powder was removed by HNO3 (1 M) leaching. Several bulk polycrystalline samples were fabricated by means of the solid state reaction method with compositions MgB2 + x wt% of MgB4 (x=0, 2, 5, and 10) at 775oC in pure argon atmosphere. X-ray diffraction indicated single phase and homogenous MgB2 bulks when MgB4 content was below 5wt%. The superconducting transitions were sharp at low MgB4 concentrations. The critical current density, Jc, depend on the MgB4 content in the MgB2 composite. The MgB2 sample with 2wt% of MgB4 processed at 775oC for 3 h showed the critical current density of 300 kA cm-2 at 20 K in self field.

KW - critical current density

KW - flux pinning

KW - magnetization measurements

KW - MgB

KW - MgB

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=84948390158&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84948390158&partnerID=8YFLogxK

U2 - 10.1016/j.phpro.2015.05.124

DO - 10.1016/j.phpro.2015.05.124

M3 - Conference contribution

AN - SCOPUS:84948390158

VL - 65

SP - 69

EP - 72

BT - Physics Procedia

PB - Elsevier

ER -