CATION TERMINATION AT ION-POLISHED AND CHEMICALLY ETCHED (001)YBA2CU3O7 CRYSTAL-SURFACES - AN ION CHANNELING STUDY

被引：11

作者：

FIORY, AT

HEBARD, AF

EICK, RH

SCHNEEMEYER, LF

WASZCZAK, JV

GOSSMANN, HJ

机构：

来源：

APPLIED PHYSICS LETTERS | 1991年 / 58卷 / 07期

关键词：

D O I：

10.1063/1.104515

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 CH3OH: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 approximately 8 angstrom, damage which is readily removed by a light chemical etch.

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页码：777 / 779

页数：3

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