Cation Termination At Ion-Polished and Chemically Etched (001)Yba 2Cu3O7 Crystal Surfaces: An Ion Channeling Study
Local cation order approaching ideal bulk termination was found for cleaned (001) surfaces of YBa2Cu3O7 crystals by ion-channeling surface-peak analysis. Surfaces etched in dilute CH 3OH:Br2 and ultrasonically agitated in CH3OH to dislodge the Br2 appear terminated preferentially by the Cu-O "double-plane" sequence, containing less than 1/2-cation monolayer of surface disorder. Planar polishing with ion beams incident at a glancing angle on a rotating crystal leaves residual disorder as low as ∼8 Å, damage which is readily removed by a light chemical etch.
MSU Digital Commons Citation
Fiory, Anthony T.; Hebard, Arthur F.; Eick, R. H.; Schneemeyer, Lynn; Waszczak, Joseph V.; and Gossmann, Hans J.L., "Cation Termination At Ion-Polished and Chemically Etched (001)Yba 2Cu3O7 Crystal Surfaces: An Ion Channeling Study" (1991). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 180.