Zobrazeno 1 - 10
of 186
pro vyhledávání: '"H. Kiefte"'
Publikováno v:
Physical Review B. 58:14261-14269
High-resolution Brillouin spectroscopy was used to investigate the elastic properties of $[{\mathrm{NH}}_{3}{(\mathrm{C}\mathrm{H}}_{3}{)]}_{5}{\mathrm{Bi}}_{2}{\mathrm{Cl}}_{11}.$ The temperature dependences of nine phonon modes propagating in the d
Publikováno v:
The Journal of Chemical Physics. 107:10684-10690
The dependence of single-crystal Brillouin spectra on both crystal orientation and pressure (P) has been measured for phases III and VI of ice. The conditions, with P in kbar, were T= -20 °C, 2.2=P=3.0 for ice III, and T= -2 °C, 6.2=P=8.2 for ice V
Publikováno v:
The Journal of Physical Chemistry B. 101:6154-6157
Large single crystals of ice III, ice V, and ice VI have been grown and in situ Brillouin spectra collected at various crystal orientations. The elastic constants have been calculated at -20° C and 2.2 kbar, -35° C and 3.0 kbar, and -2° C and 7.2
Publikováno v:
Canadian Journal of Physics. 75:473-476
A Raman scattering investigation has been performed on a T -type porous silicon layer using both eHHf and DAeD nm Ar laser excitations. The Raman spectrum collected using eHH f? 4light exhibits an asymmetrically broadened peak with a lower Raman shif
Publikováno v:
Physical Review B. 55:11174-11180
Autor:
M Kulik, M. J. Clouter, H. Kiefte, J. Zuk, R Goulding, G. T. Andrews, E. Nossarzewska‐Orlowska, N. H. Rich
Publikováno v:
Thin Solid Films. 297:106-109
The structural and light-emitting properties of porous Si prepared from differently doped p-type Si (111) substrates have been studied by Raman scattering and photoluminescence (PL). A detailed analysis of the Raman line shapes was performed using a
Publikováno v:
The Journal of Chemical Physics. 104:7854-7859
The elastic constants of ice VI have been determined at -2 °C and 7.2 kbar by single crystal Brillouin spectroscopy. The adiabatic elastic moduli were found to be C11=26.8, C12=14.5, C13=12.8, C33=26.2, C44=6.3, and C66=10.4×104 bar, within approxi
Publikováno v:
Ferroelectrics. 152:337-342
High-resolution Brillouin spectroscopy was used to study the elastic properties of (NH4)4LiH(SO4)4. The temperature dependence of eleven Brillouin modes from acowtic phonons, propagating in the [100], [001], [110] and [101] directions were measured i
Publikováno v:
Ferroelectrics. 152:331-335
Low frequency polarized Raman spectra of ferroelastic K3Na(SeO4)2 single crystal was examined in the temperature range from 80 to 360 K. The phase transition 3m → 2/m at TC=334 K is associated with Ag soft phonon mode in ferroelastic phase. Its fre
Publikováno v:
The Journal of Chemical Physics. 99:5430-5437
The elastic constants and elasto‐optic coefficient ratios of the orientationally disordered β phase of C2F6 have been determined using the technique of high resolution Brillouin spectroscopy. Just below the triple point, at 169 K, the values of th