NANO-SCALE ELECTRON-ENERGY-LOSS SPECTROSCOPY OF THE OXYGEN K-EDGE IN BI2SR2CA1CU2O8+DELTA

被引：8

作者：

ZHU, YM

SUENAGA, M

机构：

[1] Materials Science Division, Brookhaven National Laboratory, Upton

来源：

PHYSICA C | 1995年 / 252卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00442-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate, for the first time, that even in highly anisotropic, quasi-two-dimensional Bi2Sr2Ca1Cu2O8+delta, electron energy-loss spectroscopy (EELS) performed in a transmission electron microscope (TEM) is a very valuable technique for understanding local changes in the oxygen-hole density on a nanometer scale. After optimizing both the scattering angle of the incident beam and the collection angle of the spectrometer for a particular crystal orientation, a TEM-EELS experiment is capable of documenting local (similar to several nm) variations in strength of the pre-peak of oxygen absorption K edge spectrum. This investigation reveals the hole-concentration profile across grain boundaries, and hence, furthers understanding of the superconducting behavior of the grain boundary in this technologically important material.

引用

收藏

页码：117 / 124

页数：8

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