Quantitative measurements of segregation in Co-Cr-X magnetic recording media by energy-filtered transmission electron microscopy

被引：5

作者：

Bentley, J ^{[1
]}

Wittig, JE ^{[1
]}

Nolan, TP ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

HIGH-DENSITY MAGNETIC RECORDING AND INTEGRATED MAGNETO-OPTICS: MATERIALS AND DEVICES | 1998年 / 517卷

关键词：

D O I：

10.1557/PROC-517-205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reliable core-loss spectroscopic methods have been developed for mapping elemental segregation in Co-Cr-X magnetic recording media by energy-filtered transmission electron microscopy. Extraction of quantitative compositions at a spatial resolution approaching 1 nm involves sophisticated treatments for diffraction contrast, variations in specimen thickness, and closely-spaced oxygen K and chromium L-23 ionization edges. These methods reveal that intergranular chromium levels are similar to 25 at.% for random-angle boundaries and similar to 25 at.% for 90 degrees boundaries in films of Co84Cr12Ta4 d.c. magnetron sputtered at 250 degrees C.

引用

页码：205 / 210

页数：6