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Abstract:
The structural and chemical properties of the quaternary Heusler
compound Co2Cr1-xFexAl were investigated comparing powder and bulk
samples. The Iona range order was determined by means of X-ray
diffraction, while the site specific (short range) order was proved by
the extended X-ray absorption fine structure method (EXAFS). The
chemical composition was analysed by means of X-ray photo emission
spectroscopy (XPS) combined with Auger electron spectroscopy (AES) depth
profiling. The results from these methods are compared to get a detailed
idea about the differences between surface and bulk properties and
appearance of disorder in such alloys. (c) 2006 Elsevier B.V. All rights
reserved.