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Development of Mechanical Stress in Cuni(mn) Films During Temperature Ramping: Related Mechanisms
Published online by Cambridge University Press: 10 February 2011
Abstract
This paper focusses on the development of biaxial stress in Cu0.57Nio. 42Mno.ol thin films during annealing in Ar and, for comparison, in vacuum. Besides stress-temperature measurements also resistance-temperature investigations as well as chemical and microstructural characterization by Auger electron spectroscopy, scanning and transmission electron microscopy, and X-ray diffraction were carried out. To explain the stress evolution, atomic rearrangement (excessvacancy annihilation, grain-boundary relaxation, and shrinkage of grain-boundary voids) and oxidation were considered. Up to 250 - 300 °C grain-boundary relaxation was found to be the dominating process. A sharp transition from compressive to tensile stress between 300 °C and 380 °C is explained by the formation of a NiO surface layer
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- Copyright © Materials Research Society 1998