Enhancement of critical current through compound defect with proton irradiation and heavy ion irradiation in YBCO coated conductors and FeSe$_{\mathrm{x}}$Te$_{\mathrm{1-x}}$ crystals
ORAL
Abstract
We investigate the enhancement of vortex pinning by both point and columnar defects and compare the results in 2G YBCO coated conductors (CC), with T$_{\mathrm{c}}$ 90K, and in FeSe$_{\mathrm{x}}$Te$_{\mathrm{1-x}}$ single crystals with T$_{\mathrm{c}}$ 14K. Both samples were irradiated with 250 MeV Au ions to a dose-matching field of 1T. The samples were then irradiated with 4 MeV protons to a dose of 4x10$^{\mathrm{16}}$ p/cm$^{\mathrm{2}}$ and 8x10$^{\mathrm{16}}$ p/cm$^{\mathrm{2}}$ in the CC and single crystal, respectively. The major effect of compound particle irradiation in both samples resulted in a synergetic enhancement of the critical current across a wide field range, beyond the enhancement from either individual irradiation type.
*This work supported by the Center for Emergent Superconductivity, an Energy Frontier Research Center funded by the U.S. D.O.E., Office of Science, Office of Basic Energy Sciences. The work in Italy was supported by the INFN-TERASPARC project.
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