Structural and thermal properties of MnSi single crystal

Tite, T.; Shu, G. J.; Chou, F. C.; Chang, Y.-M.
July 2010
Applied Physics Letters;7/19/2010, Vol. 97 Issue 3, p031909
Academic Journal
Polarized Raman spectroscopy of MnSi single crystal was carried out to characterize its phonons, crystal structure, and thermal stability. The Raman spectra show correct Raman selection rules and consistence with those of the other transition metal silicide compounds. The MnSi thermal stability and phase transformation is investigated by monitoring the evolution of Raman spectrum as a function of the laser intensity, in which three compositions, MnSi, MnSiO3, and Mn5Si3, can be identified. The involved oxidation reaction is then proposed and verified by performing the thermogravimetric and x-ray diffraction analysis.


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