TY - JOUR
T1 - Ba2YCu3O7-δ crystal surface layers
T2 - Orthorhombic splitting, dislocations, and chemical etching
AU - Werder, D. J.
AU - Chen, C. H.
AU - Gurvitch, M.
AU - Miller, B.
AU - Schneemeyer, L. F.
AU - Waszczak, J. V.
PY - 1989/10/1
Y1 - 1989/10/1
N2 - We find by transmission electron diffraction that the orthorhombic splitting of the upper surface layers ( <1 μm) of single crystal Ba2YCu3O7-δ is reduced, differing by 10 to 30 percent from the bulk value. We also find by transmission electron microscopy that in general the surfaces are of inferior quality and, thus, not representative of the bulk. These results have important consequences for those experiments that probe only the upper surface layers. By etching with Br/ethanol and HClO4/NaClO4 the poor quality surfaces are removed.
AB - We find by transmission electron diffraction that the orthorhombic splitting of the upper surface layers ( <1 μm) of single crystal Ba2YCu3O7-δ is reduced, differing by 10 to 30 percent from the bulk value. We also find by transmission electron microscopy that in general the surfaces are of inferior quality and, thus, not representative of the bulk. These results have important consequences for those experiments that probe only the upper surface layers. By etching with Br/ethanol and HClO4/NaClO4 the poor quality surfaces are removed.
UR - http://www.scopus.com/inward/record.url?scp=0024753872&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(89)90413-9
DO - 10.1016/0921-4534(89)90413-9
M3 - Article
AN - SCOPUS:0024753872
SN - 0921-4534
VL - 160
SP - 411
EP - 416
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 5-6
ER -