Structure and flux pinning properties of irradiation defects in YBa sub 2 Cu sub 3 O sub 7-x

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We review our investigations of defects produced in YBa{sub 2}Cu{sub 3}O{sub 7-x} by various forms of irradiation. The defect microstructure has been studied by transmission electron microscopy (TEM). Irradiation enhancements of flux pinning have been studied by SQUID magnetometry on single crystals. In many cases the same single crystals were used in both TEM and SQUID investigations. The primary atom recoil spectra for all the irradiations studied have been carefully calculated and used to correlate the TEM and magnetization results for the different types of irradiation. Correlation of annealing experiments, employing both TEM and SQUID measurements, among several types of … continued below

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22 pages

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Kirk, M.A. June 1, 1992.

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We review our investigations of defects produced in YBa{sub 2}Cu{sub 3}O{sub 7-x} by various forms of irradiation. The defect microstructure has been studied by transmission electron microscopy (TEM). Irradiation enhancements of flux pinning have been studied by SQUID magnetometry on single crystals. In many cases the same single crystals were used in both TEM and SQUID investigations. The primary atom recoil spectra for all the irradiations studied have been carefully calculated and used to correlate the TEM and magnetization results for the different types of irradiation. Correlation of annealing experiments, employing both TEM and SQUID measurements, among several types of irradiation has also yielded information on the different defect structures present. Defect densities, sizes and strain field anisotropies have been determined by TEM. Defect flux pinning anisotropies have been determined for two field orientations in twinned single crystals. The temperature dependences of the flux pinning have been measured. The maximum field of irreversibility at 70 K is shown to change markedly upon both neutron and proton irradiations in some crystals and not others. The defect structure, chemistry and location in the unit cell has been determined in some cases. Some interaction with existing defect structure has been observed in proton and electron irradiations. The damage character and directionality has been determined in GeV ion irradiated crystals.

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22 pages

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OSTI; NTIS; INIS; GPO Dep.

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  • 3. international meeting on critical currents in high Tc superconductors, Vienna (Austria), 22-24 Apr 1992

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  • Other: DE92016739
  • Report No.: ANL/CP-76500
  • Report No.: CONF-920438--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5131227
  • Archival Resource Key: ark:/67531/metadc1058223

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  • June 1, 1992

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  • Jan. 22, 2018, 7:23 a.m.

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Kirk, M.A. Structure and flux pinning properties of irradiation defects in YBa sub 2 Cu sub 3 O sub 7-x, article, June 1, 1992; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1058223/: accessed June 27, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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