Cuprate-based sacrificial layers for freestanding single-crystal perovskite films

Abstract

Single crystal thin films of perovskite oxides show a vast variety of functional properties By separating the single crystal thin films from the substrate and transferring it to an arbitrary substrate heterointerfaces which have new function properties can be created We reported a method by YBCO sacrificial layer dissolved in HCl solution separates the single crystal thin film Atomic force microscopy is used to scan the surface of the thin film The lattice constant of each axis and the stress from the substrate are calculated by high resolution XRD Resistivity is measured by using standard four point probe method Results indicate that there is a enhancement in the ferromagnetic metal-paramagnetic insulator transition temperature of freestanding LSMO thin films compared to that of as grown LSMO We also demonstrated that by using YBCO as a medium for freestanding process can separate epitaxial thin films from substrates rapidly and can gain the films with high quality in structure and complete shape

Date of Award	2019
Original language	English
Supervisor	Jan-Chi Yang (Supervisor)