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*

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.