Zobrazeno 1 - 10
of 37
pro vyhledávání: '"R. DEMIRBILEK"'
Publikováno v:
Journal of Luminescence. 161:174-179
Temperature dependent Raman spectra of the crystals CsCdCl3 and CsCdBr3 grown by Bridgman method were measured in the temperature range of 5–300 K. The description of the line-broadening and the line-shift of the observed Raman lines are mainly bas
Publikováno v:
Journal of Luminescence. 131:1853-1856
The excitation and emission spectra of CsCdCl3 crystal grown by the Bridgman growth technique, are observed. Its dominant excitation spectra correspond to the transitions between the electronic energy levels of the face-shared [CdCl6](4-) octahedron
Publikováno v:
physica status solidi (b). 248:1723-1726
The RbCdBr 3 crystal that consists of edge shared [CdBr 6 ] 4― octahedrons was grown by using the Bridgman growth technique and its electronic energy levels are investigated by measuring the excitation and the emission spectra. An energy level diag
Publikováno v:
physica status solidi (b). 246:1306-1312
The absorption spectra of Ce3+, Nd3+, Eu3+, Tb3+, Er3+, Tm3+ and Yb3+ rare earth (RE) impurity ions incorporated in Srx Ba1–xNb2O6 (SBN) crystals were studied in a wide spectral range from the visible to the mid-infrared. On the basis of the analys
Publikováno v:
physica status solidi (c). 2:653-656
Non-volatile holographic storage, based on two-centre holographic recording (TCHR) has been tested in analogy to successful attempts in LiNbO3:Fe:Mn, in doubly doped strontium barium Niobate (SBN) (SrxBa1–xNb2O6). Several tests with differently co-
Publikováno v:
physica status solidi (c). 2:685-688
We studied the dynamics of energy transfer processes involving lanthanide ions in the nanocrystalline matrix of Y2O3. A set of Yb3+ and Er3+ co-doped Y2O3 powder samples consisting of crystalline particles of nanometer size in a range of 15–90 nm w
Publikováno v:
Ferroelectrics. 303:177-180
Three relatively sharp FIR absorption bands of Ce3+ in Strontium Barium Niobate (SBN) are observed in the 2000–3000 cm−1 region. A subband structure of these bands indicates three slightly inequivalent positions of the Ce3+ in the SBN crystal lat
Autor:
R. Pankrath, R. Demirbilek, A. I. Gubaev, I. L. Kislova, S. E. Kapphan, V. A. Trepakov, B. B. Pedko
Publikováno v:
Ferroelectrics. 303:185-188
The photorefractive properties of Sr x Ba1-x Nb2O6 (SBN, congruent composition x = 0.61) can be enhanced by doping with suitable polyvalent ions like Ce or Cr. We report on optical absorption measurements in the UV-FIR region and on dielectric measur
Autor:
R. DEMIRBILEK, A. I., A. B. KUTSENKO, S. E. KAPPHAN, I. P. RAEVSKI, S. A. PROSANDEEV, B. BURTON, L. JASTRABIK, V. S. VIKHNIN
Publikováno v:
Ferroelectrics. 302:279-283
Optical absorption in the IR region has been recorded and first-principles computations have been done for some Fe contining perovskites. The IR absorption reveals a broad peak at about 11000 cm−1. First principles computations established that BaF
Publikováno v:
Radiation Effects and Defects in Solids. 158:251-256
CsCdBr3 consists of linear chains of [CdBr6]4- octahedra separated by Cs☎ ions. The excited states of the covalently bound [CdBr6]4- octahedra form the lowest excitonic states of the crystal lattice. The trivalent Pr ions substitute for the divalen