SERQUIS Adriana Cristina
Microstructure and transport properties of Y-rich YBa2Cu3O7 thin films
H. WANG; A. SERQUIS; B. MAIOROV; L. CIVALE; Q. X. JIA; P. N. ARENDT; S. R. FOLTYN; J. L. MACMANUS-DRISCOLL; X. ZHANG
JOURNAL OF APPLIED PHYSICS
American Institute of Physics
Año: 2006 vol. 100 p. 539041 - 539044
Epitaxial YXBa2Cu3O7− YXBCO thin films were deposited by pulsed laser deposition on bothsingle crystal SrTiO3 (100) and buffered polycrystalline metal substrates, where X=0.9, 1.0, 1.1,1.2, and 1.3. The self-field critical current density (Jc) of YXBCO exhibits the best performance atX=1.1 for the samples on both single crystal substrates and metal substrates. Epitaxial Y2O3nanoparticles were observed in Y-rich samples (X1.0) by X-ray diffraction and cross-sectionaltransmission electron microscopy. The field-dependence and angular-dependence measurementsshow that Y2O3 nanoparticles improve the in-field Jc performance, especially in the low fieldregime, without reducing self-field Jc of YBCO films.