High quality FeSe_0.5Te_0.5 (FST) epitaxial thin films were successfully prepared on SrTiO₃ (STO), MgO and LaAlO₃ substrates with a TiO₂ buffer layer by pulsed laser deposition method, respectively. We present the results of a collaborative study on the superconducting and magnetic properties of the three types films, such as the critical temperature T _c, the anisotropy, and the critical current density J _c. A stronger matching between film and substrate plays an important role in enhancing the superconducting and magnetic properties. FST film on STO substrate shows the high superconducting transition temperature T _c about 14.6 K and the largest critical current density J _c above 10⁶ A cm⁻² at 4 K in self-field. In addition, the high-angle annular dark field imaging implies the interface sharpness at FST/TiO₂ heterostructure, contributing to a deep understanding of bonding for the iron-based superconductors.

分别通过脉冲激光沉积方法在具有TiO ₂缓冲层的SrTiO ₃ (STO)、MgO和LaAlO ₃衬底上成功制备了高质量的FeSe _0.5 Te _0.5 (FST)外延薄膜。我们展示了对三种类型薄膜的超导和磁性能的协作研究结果，例如临界温度T _c、各向异性和临界电流密度J _c。薄膜和基材之间更强的匹配在增强超导和磁性方面起着重要作用。STO 基板上的 FST 薄膜显示出高超导转变温度T _c约为 14.6 K，最大临界电流密度J _c在 4 K 时在自场中高于 10 ⁶ A cm ^-2。此外，高角度环形暗场成像暗示了 FST/TiO ₂异质结构的界面清晰度，有助于深入了解铁基超导体的键合。