Temperature Dependence on Raman Spectra and High-pressure Synchrotron Radiation Study of Re3N

Chinese Journal of Light Scattering ›› 2017, Vol. 29 ›› Issue (1) : 33-38. DOI: 10.13883/j.issn1004-5929.201701001

Temperature Dependence on Raman Spectra and High-pressure Synchrotron Radiation Study of Re3N

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Abstract

Well-crystallized bulk of Re3N was synthesized through a High-Pressure Solid-State Metathesis (HPSSM) reaction. The structural characterizations and compositions of as-prepared samples were determined by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDS), which indicated high crystalline quality of Re3N. The vibrational properties of Re3N lattices were studied by the temperature dependence on Raman spectroscopy between 77 K and 873 K. With the temperature increasing, the red-shift and broadening of Raman bands of Re3N could be well fitted using a model involving three- and four-phonon decay processes. Our fitting results indicated that the three-phonon decay processes were dominant over the four-phonon ones at high temperatures. The bulk modulus B0=417 GPa for Re3N was determined by high-pressure synchrotron radiation research indicating that Re3N synthesized through HPSSM reaction may be a potential superhard materials.

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 5d metal nitrides / Raman scattering / High-pressure synchrotron radiation

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. Temperature Dependence on Raman Spectra and High-pressure Synchrotron Radiation Study of Re3N. Chinese Journal of Light Scattering. 2017, 29(1): 33-38 https://doi.org/10.13883/j.issn1004-5929.201701001

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