Nanocrystalline α-Fe Layer Examined by Mössbauer Spectrometry
نویسندگان
چکیده
منابع مشابه
Mössbauer diffractometry on polycrystalline 57 Fe 3
A Mössbauer powder diffractometer was used to measure diffraction patterns from polycrystalline foils of Fe3Al. The intensities of Bragg diffractions were measured as a function of the energy of the incident photon. The bcc fundamental diffractions showed large changes in intensity as the incident energy was tuned through the nuclear resonances. These variations of diffraction intensity with in...
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Mössbauer spectroscopy is an indispensable spectroscopic technique and analytical tool in iron coordination chemistry. The linear correlation between the electron density at the nucleus ("contact density") and experimental isomer shifts has been used to link calculated contact densities to experimental isomer shifts. Here we have investigated relativistic methods of systematically increasing so...
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T. A. Stephens and B. Fultz Division of Engineering and Applied Science, mail 138-78, California Institute of Technology, Pasadena, California 91125 (Received 5 March 1996) Mössbauer diffraction was used to measure different autocorrelation functions for 57Fe atoms in different chemical environments. The sample was polycrystalline Fe3Al with the ordered DO3 structure. Diffraction peaks from a f...
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Diffraction patterns were measured on a polycrystalline bcc Fe foil using a Mössbauer powder diffractometer with high sensitivity. Measurements with and without a magnetic field normal to the scattering plane showed large differences in the diffracted intensities of the different nuclear resonances. These magnetic effects on diffraction intensities were interpreted successfully with a single sc...
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An interesting change of scale sequence occurred during oxidation of nanocrystalline surface layer by means of a surface mechanical attrition treatment. The three-layer oxide structure from the surface towards the matrix is Fe3O4, spinel FeCr2O4 and corundum (Fe,Cr)2O3, which is different from the typical two-layer scale consisted of an Fe3O4 outer layer and an FeCr2O4 inner layer in convention...
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ژورنال
عنوان ژورنال: Acta Physica Polonica A
سال: 2014
ISSN: 0587-4246,1898-794X
DOI: 10.12693/aphyspola.126.94