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Effects of successive proton irradiation on the peak effect in YBa2Cu3O7−δ single crystals (2001)

Tobos, V. ; Paulius, L. M. ; Petrean, A. M. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 78 (2001), S. 3097-3099

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The effect of increasing the density of uncorrelated defects on the peak effect is studied in a detwinned YBa2Cu3O7−δ single crystal. The defects were introduced with 9 MeV proton irradiation where the total dose ranged from 0.25×1015 to 2×1015 p/cm2. With each successive irradiation, the peak effect shifts down in field and is eventually suppressed in both the electrical resistivity and the dc magnetization by a sufficiently high irradiation dose. The peak effect reappears after a high temperature anneal, suggesting that it is primarily the point defects introduced by the irradiation which interfere with the formation of the peak effect. © 2001 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1352039

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Disordered Vortex Phases in YBa2Cu3O7−δ (2000)

Crabtree, G. W. ; Kwok, W. K. ; Olsson, R. J. ; [et al.]

Springer

Journal of superconductivity 13 (2000), S. 741-748

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ISSN: 1572-9605

Keywords: disordered vortex phases ; YBa2Cu3O7−δ

Source: Springer Online Journal Archives 1860-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Abstract The disordered vortex phases induced by line and point pinning in YBa2Cu3O7−δ are explored. At high defect densities, only a single disordered solid separated from the liquid phase by a melting line is observed. At low defect densities the topology of the phase diagram changes dramatically, with a vortex lattice phase adjoining disordered phases at high or low field. Critical points at the termination of the first-order melting line separate the lattice and the disordered phases. The line defect disordered phases follow the expected Bose glass behavior, while the point defect disordered phases do not exhibit the expected vortex glass behavior.