Vortex pinning in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} tapes irradiated by ions

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.16206· OSTI ID:399834

Kazumata, Y ^[1]; Kumakura, H; Togano, K ^[2]

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1. Nihon Advanced Technology, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 (Japan)
2. National Research Institute for Metals, 1-2-1, Sengen, Tsukuba, Ibaraki-ken, 305 (Japan)

Vortex pinning due to columnar and point defects was studied in Bi-2212 tapes irradiated by 230-MeV Au{sup 14+} and 120-MeV O{sup 7+} ions. Remanent magnetization and critical current density were significantly increased after irradiation in the applied field not only perpendicular to but also parallel to the {ital ab} plane. The enhancement of them in the latter field direction was interpreted as kink motion caused by Josephson vortices across the CuO{sub 2} planes. Angular dependence of irreversibility field ({ital H}{sub irr}) at 55 K showed line vortices [three dimensional (3D) vortices] for columnar defects after Au irradiation and it followed the scaling rule for point defects after O irradiation. The transition of vortices from 3D to 2D was critically influenced by {ital H}{sub irr}, namely, by a pinning potential. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 399834
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 22 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COMPARATIVE EVALUATIONS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL DEFECTS
GOLD IONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
MEV RANGE 100-1000
MIXED STATE
OXYGEN IONS
PHYSICAL RADIATION EFFECTS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K