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Title: Dimpling in critical current density vs. magnetic field angle in YBa{sub 2}Cu{sub 3}O{sub 7} films irradiated with 3-MeV gold ions

Magnetic-field-angle θ dependence of critical current density J{sub c} was measured in YBa{sub 2}Cu{sub 3}O{sub 7} films irradiated with 3-MeV gold ions. Such films were recently found to show large pinning force arising from point-like irradiation defects. A dimpled line-shape of J{sub c}(θ) and its variation with magnetic field strength were revealed that could be well described by a simple model based on flux-lattice shear and Blatter scaling. Our results strongly suggest that vortex elasticity and electron-mass anisotropy coordinately produce the characteristic J{sub c} anisotropy, called “shoulders,” in cuprate and iron-pnictide films.
Authors:
; ; ; ; ; ;  [1]
  1. National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565 (Japan)
Publication Date:
OSTI Identifier:
22266107
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; CRITICAL CURRENT; CUPRATES; CURRENT DENSITY; ELASTICITY; FILMS; GOLD IONS; IRON; IRRADIATION; MAGNETIC FIELDS; MAGNETIC FLUX; SHEAR; VORTICES; YTTRIUM COMPOUNDS