TY - JOUR
T1 - Structure and properties of (Sr, Ca)CuO2-BaCuO2 superlattices grown by pulsed laser interval deposition
AU - Koster, Gertjan
AU - Verbist, Karen
AU - Rijnders, Augustinus J.H.M.
AU - Rogalla, Horst
AU - van Tendeloo, Gustaav
AU - Blank, David H.A.
PY - 2001
Y1 - 2001
N2 - We report on the preparation of CuBa2(SrxCa1¿x)nCun¿1Oy compounds by fabrication of (Ba,Sr,Ca)CuO2 superlattices with pulsed laser deposition (PLD). A technique called interval deposition is used to suppress multi-level or island growth resulting in high-quality superlattice structures. Both, the applicability of PLD to atomic engineering as well as the fabrication of artificial superconductors is demonstrated. The (Sr,Ca)CuO2¿BaCuO2 superlattices are characterized by X-ray diffraction, high-resolution electron microscopy (HREM) and selected area electron diffraction. The superlattice period has been deduced from electron diffraction patterns and XRD measurements. For Sr containing films, the best growth behavior is observed and films with the highest degree of crystallinity are obtained, whereas superconductivity is only found in less crystalline, Ca containing films. Under some deposition conditions and depending on the amount of Ba containing layers in the superlattice, it was observed that the BaCuO2 material is converted to Ba2CuO4¿¿. Image simulations to interpret the HREM contrast are performed.
AB - We report on the preparation of CuBa2(SrxCa1¿x)nCun¿1Oy compounds by fabrication of (Ba,Sr,Ca)CuO2 superlattices with pulsed laser deposition (PLD). A technique called interval deposition is used to suppress multi-level or island growth resulting in high-quality superlattice structures. Both, the applicability of PLD to atomic engineering as well as the fabrication of artificial superconductors is demonstrated. The (Sr,Ca)CuO2¿BaCuO2 superlattices are characterized by X-ray diffraction, high-resolution electron microscopy (HREM) and selected area electron diffraction. The superlattice period has been deduced from electron diffraction patterns and XRD measurements. For Sr containing films, the best growth behavior is observed and films with the highest degree of crystallinity are obtained, whereas superconductivity is only found in less crystalline, Ca containing films. Under some deposition conditions and depending on the amount of Ba containing layers in the superlattice, it was observed that the BaCuO2 material is converted to Ba2CuO4¿¿. Image simulations to interpret the HREM contrast are performed.
KW - METIS-200538
KW - IR-36068
U2 - 10.1016/S0921-4534(00)01763-9
DO - 10.1016/S0921-4534(00)01763-9
M3 - Article
SN - 0921-4534
VL - 353
SP - 167
EP - 183
JO - Physica C
JF - Physica C
ER -