Auger electron spectroscopy grain boundary composition

The distinctive features of micro-structure of grains and grain boundaries were established by SEM, EDXA, XPS and Auger electron spectroscopy. The surface of freshly obtained splits of the ferrite was analyzed. SEM and EDX analyses were conducted on LEO 1420 microscope. XPS investigation was carried out on a ES-2410 spectrometer line C Is with Eb = 284.6 eV was used for calibration. Auger electron spectra were recorded on a Perkin Elmer PH-660 spectrometer. Phase composition of the samples was established by XRD analysis of thoroughly grinded powder by a DRON-2.0 diffractometer with Ni-fdtered Co Ka-radiation (X = 0.178896 nm). 

Al-rich compoations of this compound. Auger electron spectroscopy has shown that, for compounds with the Al-rich compositions, the aluminum concentration at the grain boundary is greater than its bulk composition. 

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