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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2006, Volume 84, Issue 3, Pages 190–196
(Mi jetpl1108)
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This article is cited in 28 scientific papers (total in 28 papers)
CONDENSED MATTER
Optimization of the conditions of synchrotron Mössbauer experiment for studying electronic transitions at high pressures by the example of (Mg, Fe)O magnesiowustite
A. G. Gavriliukabc, J. F. Lind, I. S. Lyubutina, V. V. Struzhkinc a Institute of Cristallography RAS
b Institute for High Pressure Physics, RAS
c Geophysical Laboratory, Carnegie Institution of Washington
d Lawrence Livermore National Laboratory
Abstract:
The effect of the experimental conditions on the shape of the nuclear resonant forward scattering (NFS) from (Mg0.75Fe0.25)O magnesiowustite has been studied at high pressures up to 100 GPa in diamond anvil cells by the method of the NFS of synchrotron radiation from the Fe-57 nuclei at room temperature. The behavior of the system in the electronic transition of the Fe2+ ion from the high-spin to low-spin state (spin crossover) near 62 GPa is analyzed as a function of the sample thickness, degree of nonhydrostaticity, and focusing and collimation conditions of a synchrotron beam. It is found that the inclusion of dynamical beats associated with the sample thickness is very important in the approximation of the experimental NFS spectra. It is shown that the electronic transition occurs in a much narrower pressure range (±6 GPa) rather than in a broad range as erroneously follows from experiments with thick samples under strongly nonhydrostatic conditions.
Received: 05.07.2006
Citation:
A. G. Gavriliuk, J. F. Lin, I. S. Lyubutin, V. V. Struzhkin, “Optimization of the conditions of synchrotron Mössbauer experiment for studying electronic transitions at high pressures by the example of (Mg, Fe)O magnesiowustite”, Pis'ma v Zh. Èksper. Teoret. Fiz., 84:3 (2006), 190–196; JETP Letters, 84:3 (2006), 161–166
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https://www.mathnet.ru/eng/jetpl1108 https://www.mathnet.ru/eng/jetpl/v84/i3/p190
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