Shim, SY Kim, DH Hwang, JS Hwang, TJ Lim, HR Oh, SJ Ri, HC Park, JH Hahn, TS Kim, JT 2024-01-21T17:01:12Z 2024-01-21T17:01:12Z 2021-09-03 1998-07 0374-4884 https://pubs.kist.re.kr/handle/201004/142981 We have studied the magnetic properties of YBa2CU3O7 Single crystals with crossed columnar defects of various splay angles (0 degrees similar to +/-40 degrees). In the temperature range between 50 and 70 K, crystals with +/-20 degrees show the highest enhancement in J(c) near the matching field of the defect density. We also find that the normalized creep rates and the vortex, activation energies change with the splay angle. The relaxation rate for a +/-20 degrees crystal shows the lowest value for magnetic fields near the matching field, consistent with the J(c) results. Possible vortex dynamics associated with the crossed columnar defects are discussed. English KOREAN PHYSICAL SOC Magnetic properties in YBa2Cu3O7 single crystals with a crossed configuration of columnar defects Article 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.33, no.1, pp.81 - 85 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 33 1 81 85 N scie scopus 000074932100014 2-s2.0-0032396821 Physics, Multidisciplinary Physics Article HIGH-TEMPERATURE SUPERCONDUCTORS FLUX-CREEP VORTEX CREEP RELAXATION LOCALIZATION VORTICES ANGLES YBCO single crystal columnar defect crossed configuration magnetic properties