Magneto-optical study of flux penetration in heavy-ion irradiated high-Tc single crystals

Th Schuster, M. Leghissa, Michael Rudolf Koblischka, H. Kuhn, M. Kraus, H. Kronmüller, G. Saemann-Ischenko

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Single crystals of Bi2Sr2CaCu2O8+δ (Bi-2212) and of DyBa2Cu3O7-δ have been exposed to high-energy heavy-ion irradiation (230 MeV 58Ni-ions, 0.5 GeV 127I-ions and 1.0 GeV 208Pb-ions) with various fluences perpendicular to the sample surface and hence parallel to the c-axis of the crystals. The irradiation with Ni-ions produces spherical regions of amorphized material, whereas the iodine and lead ions create columnar defects along the paths of the projectiles in the superconductors. Using the high-resolution Faraday effect (HRF) technique, domain patterns of the Shubnikov phase are investigated. From the measured flux-density profiles, the acting local pinning forces and critical current densities are determined. To allow direct comparison of the irradiation effects under the same experimental conditions, one half of each crystal was covered by an absorber during the irradiation. Fluence-dependent measurements of the pinning forces are performed and the influence of irradiation on flux-creep effects is also investigated. All heavy-ion irradiated samples show an enhancement of the measured critical current densities up to a factor of 33 as compared to the unirradiated region of the same crystal. The effective activation energies for flux creep remain unchanged after each kind of irradiation in both types of single crystals.

Original languageEnglish
Pages (from-to)203-222
Number of pages20
JournalPhysica C: Superconductivity and its Applications
Volume203
Issue number1-2
DOIs
Publication statusPublished - 1992 Dec 1
Externally publishedYes

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Heavy Ions
Heavy ions
heavy ions
penetration
Irradiation
Single crystals
Ions
Fluxes
irradiation
single crystals
ions
Crystals
critical current
Creep
fluence
current density
crystals
Faraday effect
Projectiles
Ion bombardment

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Magneto-optical study of flux penetration in heavy-ion irradiated high-Tc single crystals. / Schuster, Th; Leghissa, M.; Koblischka, Michael Rudolf; Kuhn, H.; Kraus, M.; Kronmüller, H.; Saemann-Ischenko, G.

In: Physica C: Superconductivity and its Applications, Vol. 203, No. 1-2, 01.12.1992, p. 203-222.

Research output: Contribution to journalArticle

Schuster, Th ; Leghissa, M. ; Koblischka, Michael Rudolf ; Kuhn, H. ; Kraus, M. ; Kronmüller, H. ; Saemann-Ischenko, G. / Magneto-optical study of flux penetration in heavy-ion irradiated high-Tc single crystals. In: Physica C: Superconductivity and its Applications. 1992 ; Vol. 203, No. 1-2. pp. 203-222.
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