Columnar tilt and vortex stress in superconducting thin films of NdBa{sub 2}Cu{sub 3}O{sub 7-{delta}}: Magnetization critical current-density measurements

Journal Article · Wed Dec 15 00:00:00 EST 2004 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1812351· OSTI ID:20662225

Khatua, Sanghamitra; Mishra, P K; Kumar, Ravi; Kundaliya, D C; Buddhikot, D; Pinto, R; Malik, S K ^[1]

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1. Department of Physics, Jai Hind College, Bombay 400 020 (India)

C-axis-oriented NdBa{sub 2}Cu{sub 3}O{sub 7-{delta}} thin films (thickness {approx}2000 A ring ) on LaAlO{sub 3} substrates have been prepared and irradiated with Ag{sup +14} (200 MeV) ions at different inclinations ({theta}{sub d}=0 deg., 15 deg., 30 deg., and 45 deg.) to the c axis. Magnetization-field hysteresis loops have been obtained on pristine and irradiated thin films at two different temperatures in applied magnetic fields up to 5 T. Estimates of the critical current density J{sub c}(H,{theta}) and the volume pinning force F{sub p}(H,{theta}) from the magnetization data reveal a strong dependence on track inclination. An increase and a subsequent saturation in F{sub p}(H,{theta}), instead of the usual Gaussian peak around the equivalent matching field, B{sub {phi}}, is observed. It is suggested that this dependence of J{sub c} (or F{sub p}) on {theta}{sub d} is a consequence of the effective modification of vortex pinning by tilted columnar defects.

• OSTI ID: 20662225
• Journal Information: Journal of Applied Physics, Vol. 96, Issue 12; Other Information: DOI: 10.1063/1.1812351; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BARIUM COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENT DENSITY
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
INCLINATION
IRRADIATION
LANTHANUM COMPOUNDS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIZATION
MEV RANGE 100-1000
NEODYMIUM COMPOUNDS
SILVER IONS
STRESSES
SUPERCONDUCTIVITY
THIN FILMS
VORTICES