Analysis of magnetization loops of electrospun nonwoven superconducting fabrics

Xian Lin Zeng, Thomas Karwoth, Michael Rudolf Koblischka, Uwe Hartmann, Denis Gokhfeld, Crosby Chang, Thomas Hauet

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Networks of superconducting Bi2Sr2CaCu2O8 (Bi-2212) nanowires were fabricated by the electrospinning technique. The nanowires have a diameter of the order of 150-200 nm and lengths up to the micrometer range and form a nonwoven, fabric-like network with numerous interconnections enabling a current flow between the nanowires. The porosity of this nanowire network is 0.9928. Therefore, this material represents a novel class of ultraporous high-temperature superconductors. The magnetizations of the nanowire networks [M(T) and M(H)] were recorded by SQUID magnetometry. The magnetic properties were analyzed using the extended critical state model (ECSM). It is supposed that the averaged diameter of the nanowires rules the magnetic field dependence of the critical current density of the nanowire network. Single nanowires have remarkably high values of the critical current density of 1.04×107A/cm2 at 5 K. The macroscopic critical current density less than ∼0.05A/cm2 at 5 K is fine for this lightweight material. Using ECSM, several important magnetic parameters could be determined including the penetration field Hp, the irreversibility fields Hirr, the upper critical field Hc2, and the flux pinning forces. Applications for this material class may be found in the direction of sensors, thin shielding layers, or nanoporous bulks.

Original languageEnglish
Article number044802
JournalPhysical Review Materials
Volume1
Issue number4
DOIs
Publication statusPublished - 2017 Sep 8
Externally publishedYes

Fingerprint

Nanowires
Magnetization
nanowires
magnetization
critical current
current density
Flux pinning
Nonwoven fabrics
High temperature superconductors
SQUIDs
flux pinning
Electrospinning
high temperature superconductors
Shielding
magnetic measurement
shielding
micrometers
Magnetic properties
penetration
Porosity

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Analysis of magnetization loops of electrospun nonwoven superconducting fabrics. / Zeng, Xian Lin; Karwoth, Thomas; Koblischka, Michael Rudolf; Hartmann, Uwe; Gokhfeld, Denis; Chang, Crosby; Hauet, Thomas.

In: Physical Review Materials, Vol. 1, No. 4, 044802, 08.09.2017.

Research output: Contribution to journalArticle

Zeng, Xian Lin ; Karwoth, Thomas ; Koblischka, Michael Rudolf ; Hartmann, Uwe ; Gokhfeld, Denis ; Chang, Crosby ; Hauet, Thomas. / Analysis of magnetization loops of electrospun nonwoven superconducting fabrics. In: Physical Review Materials. 2017 ; Vol. 1, No. 4.
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