High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure

Y. Zhao, Y. Feng, C. H. Cheng, L. Zhou, Y. Wu, T. Machi, Y. Fudamoto, N. Koshizuka, Masato Murakami

Research output: Contribution to journalArticle

188 Citations (Scopus)

Abstract

Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. The density, diamagnetic signal, and Jc of the samples change significantly with the doping level, with the best result achieved at cursive chi = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field and 5 × 104 A/cm2 in 5 T. At 20 K, the Jc is still as high as 1.3 × 106 A/cm2 in the self-field and 9.4 × 104 A/cm2 in 2 T. It is observed that partial melting occurs in the Ti-doped samples, resulting in an excellent grain connection and extremely high density. In addition, some fine particles (with sizes from 10 to 100 nm) of the second phases induced by Ti doping are distributed in the MgB2 matrix, and this may play an important role in flux pinning enhancement.

Original languageEnglish
Pages (from-to)1154-1156
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number8
DOIs
Publication statusPublished - 2001 Aug 20
Externally publishedYes

Fingerprint

critical current
current density
flux pinning
melting
solid state
augmentation
matrices

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure. / Zhao, Y.; Feng, Y.; Cheng, C. H.; Zhou, L.; Wu, Y.; Machi, T.; Fudamoto, Y.; Koshizuka, N.; Murakami, Masato.

In: Applied Physics Letters, Vol. 79, No. 8, 20.08.2001, p. 1154-1156.

Research output: Contribution to journalArticle

Zhao, Y, Feng, Y, Cheng, CH, Zhou, L, Wu, Y, Machi, T, Fudamoto, Y, Koshizuka, N & Murakami, M 2001, 'High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure', Applied Physics Letters, vol. 79, no. 8, pp. 1154-1156. https://doi.org/10.1063/1.1396629
Zhao, Y. ; Feng, Y. ; Cheng, C. H. ; Zhou, L. ; Wu, Y. ; Machi, T. ; Fudamoto, Y. ; Koshizuka, N. ; Murakami, Masato. / High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure. In: Applied Physics Letters. 2001 ; Vol. 79, No. 8. pp. 1154-1156.
@article{f6b6c1b366c74e95893ab4ac8117eb6b,
title = "High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure",
abstract = "Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. The density, diamagnetic signal, and Jc of the samples change significantly with the doping level, with the best result achieved at cursive chi = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field and 5 × 104 A/cm2 in 5 T. At 20 K, the Jc is still as high as 1.3 × 106 A/cm2 in the self-field and 9.4 × 104 A/cm2 in 2 T. It is observed that partial melting occurs in the Ti-doped samples, resulting in an excellent grain connection and extremely high density. In addition, some fine particles (with sizes from 10 to 100 nm) of the second phases induced by Ti doping are distributed in the MgB2 matrix, and this may play an important role in flux pinning enhancement.",
author = "Y. Zhao and Y. Feng and Cheng, {C. H.} and L. Zhou and Y. Wu and T. Machi and Y. Fudamoto and N. Koshizuka and Masato Murakami",
year = "2001",
month = "8",
day = "20",
doi = "10.1063/1.1396629",
language = "English",
volume = "79",
pages = "1154--1156",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "8",

}

TY - JOUR

T1 - High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure

AU - Zhao, Y.

AU - Feng, Y.

AU - Cheng, C. H.

AU - Zhou, L.

AU - Wu, Y.

AU - Machi, T.

AU - Fudamoto, Y.

AU - Koshizuka, N.

AU - Murakami, Masato

PY - 2001/8/20

Y1 - 2001/8/20

N2 - Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. The density, diamagnetic signal, and Jc of the samples change significantly with the doping level, with the best result achieved at cursive chi = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field and 5 × 104 A/cm2 in 5 T. At 20 K, the Jc is still as high as 1.3 × 106 A/cm2 in the self-field and 9.4 × 104 A/cm2 in 2 T. It is observed that partial melting occurs in the Ti-doped samples, resulting in an excellent grain connection and extremely high density. In addition, some fine particles (with sizes from 10 to 100 nm) of the second phases induced by Ti doping are distributed in the MgB2 matrix, and this may play an important role in flux pinning enhancement.

AB - Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. The density, diamagnetic signal, and Jc of the samples change significantly with the doping level, with the best result achieved at cursive chi = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field and 5 × 104 A/cm2 in 5 T. At 20 K, the Jc is still as high as 1.3 × 106 A/cm2 in the self-field and 9.4 × 104 A/cm2 in 2 T. It is observed that partial melting occurs in the Ti-doped samples, resulting in an excellent grain connection and extremely high density. In addition, some fine particles (with sizes from 10 to 100 nm) of the second phases induced by Ti doping are distributed in the MgB2 matrix, and this may play an important role in flux pinning enhancement.

UR - http://www.scopus.com/inward/record.url?scp=0035920696&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035920696&partnerID=8YFLogxK

U2 - 10.1063/1.1396629

DO - 10.1063/1.1396629

M3 - Article

VL - 79

SP - 1154

EP - 1156

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 8

ER -