Comparative study of CSD-grown <i>RE</i>BCO films with different rare earth elements: processing windows and <i>T</i> <sub>c</sub>
Manuela Erbe, Pablo Cayado, W. Freitag, Kai Ackermann, Marcel Langer, Alexander Meledin, Jens Hänisch, B. Holzäpfel
Abstract
REBa2Cu3O7−x (REBCO, RE = rare earth) compounds with different single RE elements were grown via TFA-MOD (metal-organic deposition of trifluoroacetates) to clarify their Tc values when grown by the same preparation method and their processing windows; here: the crystallisation temperatures at a constant process gas composition (pO2, pH2O). We focussed on the lanthanides (Ln) Nd, Sm, Gd, Dy, Ho, Er and Yb as substituents for Y in the REBCO phase and investigated their growth behaviour in terms of resulting physical (inductive Tc and Jc(77 K)) and structural properties (determined by XRD, SEM, TEM). All phases were grown as pristine films on LaAlO3 and SrTiO3 and compared to their respective nanocomposites with 12 mol% BaHfO3 for in-field pinning enhancement.