Flux dynamics and magnetovoltage measurements in a macroscopic cylindrical hole drilled in BSCCO

• Published in: Physica. C, Superconductivity Vol. 463-465; pp. 445 - 448
• Main Authors: Yetiş, H., Altinkok, A., Olutaş, M., Kiliç, A., Kiliç, K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2007; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Flux pinning; Magnetoresistance; Physics; Properties of type I and type II superconductors; Superconductivity; Transport properties (electric and thermal conductivity, thermoelectric effects, etc.); Type-II superconductors; Vortex lattices ,flux pinning, flux creep; 74.25.Qt; Type-II superconductors; Flux pinning; Magnetoresistance; 74.72.Hs; External fields; Magnetic field effects; Polycrystals; Bismuth oxides; Order parameters; Calcium oxides; Strontium oxides; Trapping; Flux pinning; Magnetoresistance; Type-II superconductors; Asymmetry; Materials drilling; 74.72.Hs; 74.25.Qt; High-Tc superconductors; IV characteristic; Copper oxides; Hysteresis
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2007.05.034

Slow transport relaxation measurements (V–t curves) and magnetovoltage measurements (V–H curves) were carried out in a polycrystalline sample of Bi1.7Pb0.3Sr2Ca2Cu3Ox (BSCCO) with a macroscopic cylindrically drilled hole (CH). The time evolution of quenched state in V–t curves was interpreted in terms of enhancement of the superconducting order parameter and the relaxation of moving entity. Upon cycling of the external magnetic field with different sweep rates, unusual counter clockwise hysteresis effects and asymmetry in V–H curves are observed in BSCCO sample with CH, which can also be correlated to the trapping of the macroscopic flux bundles in CH.