TY - JOUR
KW - Yttrium compounds
KW - Heterostructures
KW - High temperature superconductors
KW - Ceramic materials
KW - Yttrium barium copper oxides
KW - Oxide superconductors
KW - Praseodymium Barium Copper Oxides
KW - Microscopic Examination–Transmission Electron Microscopy
KW - Praseodymium Compounds
KW - AC Susceptibility
AU - Ramamoorthy Ramesh
AU - A Inam
AU - D.L Hart
AU - C.T Rogers
AB - We have studied the microstructure of epitaxial a,b-axis oriented YBCO-PrBCO heterostructures using transmission electron microscopy. These films, grown on single crystal [001] SrTiO3 or LaAlO3 by pulsed laser deposition, have a Tc,0 of 84 K as determined by DC resistivity and AC susceptibility measurements. The PrBCO layer acts as a good buffer and template layer for the subsequent growth of a-axis oriented YBCO layer. Planar sections reveal the existence of two 90° rotated variants, with a small (<5%) fraction of c-axis oriented regions. These films are relatively free of polytypoidic defects, compared to c-axis oriented films. Selected area electron diffraction patterns obtained from cross sections and planar sections reveal the orientation relationship in which the a-axis of the YBCO layer and the b-axis of the PrBCO layer are normal to the substrate surface. © 1990.
BT - Physica C: Superconductivity and its applications
DO - 10.1016/0921-4534(90)90331-8
LA - eng
M1 - 3-4
N1 - cited By 25
N2 - We have studied the microstructure of epitaxial a,b-axis oriented YBCO-PrBCO heterostructures using transmission electron microscopy. These films, grown on single crystal [001] SrTiO3 or LaAlO3 by pulsed laser deposition, have a Tc,0 of 84 K as determined by DC resistivity and AC susceptibility measurements. The PrBCO layer acts as a good buffer and template layer for the subsequent growth of a-axis oriented YBCO layer. Planar sections reveal the existence of two 90° rotated variants, with a small (<5%) fraction of c-axis oriented regions. These films are relatively free of polytypoidic defects, compared to c-axis oriented films. Selected area electron diffraction patterns obtained from cross sections and planar sections reveal the orientation relationship in which the a-axis of the YBCO layer and the b-axis of the PrBCO layer are normal to the substrate surface. © 1990.
PY - 1990
SP - 325
EP - 332
T2 - Physica C: Superconductivity and its applications
TI - Microstructure studies of a-axis oriented YBa2Cu3O7-x-PrBa2Cu3O7-y heterostructures
VL - 170
SN - 09214534
ER -