Park, JH Kim, DH Shim, SY Kim, YH Lee, JM Hahn, TS Hettinger, JD Steel, DG Gray, KE Glagola, B Lee, J Khim, ZG 2024-01-21T18:07:56Z 2024-01-21T18:07:56Z 2021-09-01 1997-08-10 0921-4534 https://pubs.kist.re.kr/handle/201004/143649 We have studied the effect of heavy-ion irradiation on the transport properties of YBa2Cu3Ox thin films. Columnar defects parallel to the c axis (0 degrees) and crossed columnar defects with various inclination angles (theta = +/- 10 degrees, +/- 20 degrees, and +/- 40 degrees) were introduced into films by 1.3 GeV U-ion irradiation with dose equivalent to 1 T vortex density. Transport properties including irreversibility fields, activation energies, and critical current densities have been measured in magnetic fields applied parallel to the c axis. The best transport properties were observed in samples of theta = +/- 10 degrees in most of the H-T plane we studied, consistent with the splay model. However, the relative enhancement of the critical current density in the theta = +/- 10 degrees compared to the 0 degrees sample was not as large as in the case of a single crystal suggesting that in films the point defects also play an important part in flux pinning. (C) 1997 Elsevier Science B.V. English ELSEVIER SCIENCE BV HIGH-TEMPERATURE SUPERCONDUCTORS LINEAR DEFECTS ION IRRADIATION VORTEX MOTION CRYSTALS CONFIGURATIONS CURRENTS SPLAY Enhanced transport properties in YBa2Cu3Ox films with crossed columnar defects of various inclination angles Article 10.1016/S0921-4534(97)01482-2 1 PHYSICA C, v.281, no.4, pp.310 - 316 PHYSICA C 281 4 310 316 scie scopus A1997YD49700006 2-s2.0-0000700753 Physics, Applied Physics, Condensed Matter Physics Article HIGH-TEMPERATURE SUPERCONDUCTORS LINEAR DEFECTS ION IRRADIATION VORTEX MOTION CRYSTALS CONFIGURATIONS CURRENTS SPLAY YBa2Cu3Ox films crossed columnar defects transport properties