2017年8月1日 · Raman spectra were recorded on Express-Raman spectrometer Senterra (from Bruker) with λ = 785 nm and 5 mW power as an excitation light source. Photoluminescence spectra were obtained with a fluorescence spectrometer Fluorolog-3 with a Xe-arc lamp (450 W) as an excitation source.

We have performed in situ X-ray diffraction, Raman scattering, pseudosymmetry analysis and quantum mechanical atomistic simulations of the structure and behaviour of LaF (3) at high pressure, up...

Crystal structure of LaF3 single crystal is refined in tysonite-type trigonal unit cell P-3c1 using density functional theory calculations and Raman spectroscopy. It is shown that trigonal...

In the present paper, the density functional theory and Raman spectroscopy methods are used for elimination of the discrepancy in the structure investigation results. The phonon wavenumbers and forms of Raman-active vibrations are cal-culated for the first time.

2018年5月25日 · Crystal structure of LaF3 single crystal is refined in tysonite-type trigonal unit cell P-3c1 using density functional theory calculations and Raman spectroscopy. It is shown that trigonal...

2018年5月25日 · Crystal structure of LaF 3 single crystal is refined in tysonite-type trigonal unit cell Pc 1 using density functional theory calculations and Raman spectroscopy. It is shown that trigonal structure with Pc 1 space group is more energy-efficient than hexagonal structure with space group P 6 3cm.

2018年6月28日 · We observe stimulated low-frequency Raman scattering (SLFRS) caused by laser pulse interaction with acoustic vibrations of nanoparticles in water suspensions of LaF 3 nanoparticles. We show that frequency shifts of the scattering correspond to the eigenfrequencies of nanoparticles vibrations.

We have performed in situ X-ray diffraction, Raman scattering, pseudosymmetry analysis and quantum mechanical atomistic simulations of the structure and behaviour of LaF 3 at high pressure, up to and exceeding the phase transition pressure reported for the I 4/ mmm structure and Cmma symmetry proposed previously.

2010年10月29日 · High temperature Raman and Brillouin light scattering experiments have been combined with molecular dynamics simulations to provide a comprehensive study of the superionic state of BaF 2 ( x v mol% LaF 3 ) over a particularly wide range of LaF 3 dopant concentrations from x =0 to 50.

1997年7月18日 · The quadrupole transitions of 139 La nuclei around Pr 3+ doped in LaF 3 have been detected as an optical-rf induced coherent Raman beat on the Pr 3+3 H 4 3 P 0 transition (25 cm −1) at 1.5 K.