Physics – Condensed Matter – Superconductivity
Scientific paper
2008-06-15
J. Phys.: Conf. Series 150, 052216 (2009)
Physics
Condensed Matter
Superconductivity
to be presented at LT-25 conference
Scientific paper
10.1088/1742-6596/150/5/052216
High intensity ultrasonic irradiation (sonication) of alkane slurries of polycrystalline \ybco leads to a significant modification of the grain morphology and, if performed with enforced oxygen flow, results in the increase of the superconducting transition temperature. Sonication with added Fe(CO)$_5$ produces magnetic \fe2o3 nanoparticles deposited on the surface of \ybco (YBCO) granules. Upon sintering these nanoparticles should act as efficient pinning centers utilizing both condensation and magnetic contributions to the free energy. The developed method could become a major technique to produce practically useful high-pinning nanocomposite materials based on \ybco superconductor.
McCarty Ben
Prozorov Ruslan
Prozorov Tanya
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