Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Marjorie Mujaji"'
Near-infrared emission in the 885–915 nm region was observed for two distinct Nd3+ centres that co-exist in hexagonal wurtzite ZnO:1 mol%Nd3+:10 mol%Li+ powders. The powder samples were prepared by sintering in air at 950 °C and the emission, attr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c395f7790758197d09dee5b270243a7
https://eprints.keele.ac.uk/7413/1/solidjackson.pdf
https://eprints.keele.ac.uk/7413/1/solidjackson.pdf
Publikováno v:
Journal of Luminescence. 237:118198
Indirect (Ar+-laser) and direct (dye-laser) excitation of Nd3+ ions in unannealed (as-deposited) and annealed r-f sputtered ZnO:1.5mol%Nd3+ films resulted in emission in the 875–915 nm region. This is attributed to the 4F3/2 → 4I9/2 transitions o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2df078a4735f2b46d77de084bfafa79
https://doi.org/10.1016/j.jlumin.2021.118198
https://doi.org/10.1016/j.jlumin.2021.118198
Autor:
Marjorie Mujaji
Publikováno v:
Journal of Luminescence. 162:140-144
Laser selective excitation and polarization studies of the dominant C 3v symmetry Pr 3+ centre in BaF 2 :0.1%Pr 3+ crystals have been carried out in the 10–75 K temperature range. Crystal-field energy levels for seven of the 12 multiplets of Pr 3+
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c06e857832978706a12c5afd6c165af2
https://doi.org/10.1016/j.jlumin.2015.02.017
https://doi.org/10.1016/j.jlumin.2015.02.017
Publikováno v:
Journal of Luminescence. 151:106-110
Absorption and site-selective laser spectroscopy of BaF 2 single crystals homogeneously doped with Nd 3+ ions as well as heterogeneously doped with Nd 3+ and either Gd 3+ or Yb 3+ ions, performed at 10 K, is presented. In each case a single centre, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7935e473718e0b02b7c8097eb1e13914
https://doi.org/10.1016/j.jlumin.2014.02.011
https://doi.org/10.1016/j.jlumin.2014.02.011
Autor:
J. D. Comins, Marjorie Mujaji
Publikováno v:
physica status solidi c. 4:851-855
Raman scattering studies of the T2g mode in an undoped CaF2 crystal and in CaF2 crystals separately doped with 10% of Tb3+, Tm3+ and Nd3+ ions as well as 10% to 20% of La3+ ions, in the temperature range 295 K – 1400 K, are presented. The linewidth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4253bd379eba5ca8fb04cfafa8df3ca1
https://doi.org/10.1002/pssc.200673772
https://doi.org/10.1002/pssc.200673772
Publikováno v:
physica status solidi (c). 2:490-494
High temperature Brillouin and Raman light scattering studies have been used to study the transition to the superionic state of CaF2 (10 mol%LaF3) and CaF2 (10 mol%TbF3) over the range 300 to 1200 K. The Brillouin scattering results yield the tempera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::389eb9b9eb05de3a917272d7e363d7e8
https://doi.org/10.1002/pssc.200460215
https://doi.org/10.1002/pssc.200460215
Autor:
Marjorie Mujaji, J. D. Comins
Publikováno v:
physica status solidi (c). 1:2372-2377
The technique of selective laser excitation is used to document the centres present in CaF2 and CsCdBr3 crystals containing Ho3+ ions and to assess the up-conversion fluorescence yields of the centres. For dopant levels of up to 0.05%, the two centre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1747bc9da43c8bc608db3cddd7582cc
https://doi.org/10.1002/pssc.200404840
https://doi.org/10.1002/pssc.200404840
Autor:
Marjorie Mujaji, J. D. Comins
Publikováno v:
Physical Review B. 60:831-835
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::660a4d209cc890931a2266fe58444883
https://doi.org/10.1103/physrevb.60.831
https://doi.org/10.1103/physrevb.60.831
Autor:
J. D. Comins, Marjorie Mujaji
Publikováno v:
Physical Review B. 59:6092-6099
Three distinct dimer centers are observed in ${\mathrm{CaF}}_{2}:0.1%$ ${\mathrm{Ho}}^{3+}$ crystals while two similar centers are present in ${\mathrm{SrF}}_{2}:0.1%$ ${\mathrm{Ho}}^{3+}$ crystals. The ${\mathrm{Ho}}^{3+}$ dimer centers in ${\mathrm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f11f3c36e2d096bcdb442765a3763e1
https://doi.org/10.1103/physrevb.59.6092
https://doi.org/10.1103/physrevb.59.6092
Publikováno v:
Physical Review B. 48:710-725
With the use of laser-selective excitation, an extensive set of energy levels has been established for the principal Ho 3+ dimer center in CsCdBr 3 :Ho 3+ crystals. The observed splittings of around 2 cm -1 of the transitions to or from energy levels
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60c6efc7967484269f4c877730be0ec9
https://doi.org/10.1103/physrevb.48.710
https://doi.org/10.1103/physrevb.48.710