Vortex observation in Tl-based superconductors with a scanning SQUID microscopy

Okayasu, Satoru; Nishio, Taichiro*; Ono, Masao; Mashimo, Tsutomu; Tanaka, Yasumoto*; Iyo, Akira*

Physica C, 437-438, p.239 - 241, 2006/05

https://doi.org/10.1016/j.physc.2006.03.007

Pinning properties of superconducting material Tl-1223 thin film are investigated. Vortex images are compared between a pristine and high-energy gold ion irradiated sample. This comparison implies which pinning center is effective for this material between large pinning centers and columnar defect. Large pinning centers are better for this material.