Temperature-dependence of X-ray excited luminescence of β-Ga2O3 single crystals

2019 ◽  
Vol 115 (7) ◽  
pp. 071904 ◽  
Author(s):  
Huili Tang ◽  
Nuotian He ◽  
Zhichao Zhu ◽  
Mu Gu ◽  
Bo Liu ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Single Crystals ◽  
X Ray ◽  
Excited Luminescence

Polymorphic transformations and thermal expansion of some modifications in Ag1.5Cu0.5Se and Ag0.4Cu1.6Se

2019 ◽  
Vol 33 (23) ◽  
pp. 1950271 ◽  
Author(s):  
Y. I. Aliyev ◽  
Y. G. Asadov ◽  
A. O. Dashdemirov ◽  
R. D. Aliyeva ◽  
T. G. Naghiyev ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Diffraction Method ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Polymorphic Transformations ◽  
X Ray

The Ag[Formula: see text]Cu[Formula: see text]Se and Ag[Formula: see text]Cu[Formula: see text]Se compounds have been synthesized and grown as single crystals. High-temperature X-ray diffraction method was used to study polymorphic transformations. It is shown that the Ag[Formula: see text]Cu[Formula: see text]Se crystals of high-temperature FCC modification are decomposed into Ag2Se and AgCuSe when the temperature decreases below T = 488 K and Ag[Formula: see text]Cu[Formula: see text]Se is decomposed into Cu2Se and AgCuSe when the temperature decreases below T = 540 K. Transformations in both compounds are reversible. Crystalline parameters are obtained and the temperature dependence of the lattice parameters for each phase is built.

Temperature dependence of the thermal diffuse X-ray scattering from sodium single crystals

1990 ◽  
Vol 68 (11) ◽  
pp. 1279-1290
Author(s):  
W. Mayr ◽  
G. Fritsch ◽  
E. Lüscher
Keyword(s):  
Temperature Dependence ◽  
Single Crystals ◽  
Cross Section ◽  
Reciprocal Lattice ◽  
Scattering Cross Section ◽  
X Ray ◽  
Scattering Cross ◽  
X Ray Scattering ◽  
Thermal Diffuse ◽  
Ray Scattering

We report on experimental results for the thermal diffuse X-ray-scattering cross section from Na single crystals. Data are presented for the [100], [110], and [111] directions taken in the temperature range from 38 K to the melting point. In addition we present a numerical calculation of the harmonic diffuse-scattering cross section including all orders of multiphonon contributions using a realistic phonon-dispersion relation. The results of this model are compared with a simpler approximation for the higher order multiphonon terms. The differences between the calculations and the experimental data show a distinct asymmetrical behaviour with respect to the reciprocal lattice points. Owing to this fact and their temperature dependence they can be related to anharmonic scattering. The contributions of the four lowest order terms are derived from the data. The lowest order antisymmetric contribution agrees quite well with available theoretical calculations.

Formation conditions and temperature dependence of forbidden reflections during resonant X-ray diffraction in zinc oxide single crystals

2007 ◽  
Vol 52 (4) ◽  
pp. 604-610 ◽  
Author(s):  
A. M. Kolchinskaya ◽  
V. E. Dmitrienko ◽  
S. Collins ◽  
E. N. Ovchinnikova ◽  
A. P. Oreshko
Keyword(s):  
Zinc Oxide ◽  
Temperature Dependence ◽  
Single Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Formation Conditions

Ionic Conductivity of Li2ZnTi3O8 Single Crystal

2011 ◽  
Vol 497 ◽  
pp. 26-30 ◽  
Author(s):  
Shinichi Furusawa ◽  
Hiroshi Ochiai ◽  
Khoji Murayama
Keyword(s):  
Ionic Conductivity ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Floating Zone ◽  
Zinc Titanate ◽  
X Ray ◽  
Temperature Range ◽  
First Time

Single crystals of lithium zinc titanate (Li2ZnTi3O8) were grown in a double-mirror type optical floating-zone furnace for the first time. Single crystals were characterized by X-ray powder diffraction and Laue measurements. The ionic conductivity of the single crystals was measured in the temperature range of 400–700 K. Below 600 K, the ionic conductivity of the single crystal is one to two orders of magnitude higher than that of polycrystalline Li2ZnTi3O8. In the temperature range of 550–600 K, the temperature dependence of the ionic conductivity shows non-Arrhenius behaviour.

X-ray excited luminescence of cuprous iodide single crystals: On the nature of red luminescence

2009 ◽  
Vol 95 (22) ◽  
pp. 221904 ◽  
Author(s):  
Pan Gao ◽  
Mu Gu ◽  
Xiao-Lin Liu ◽  
Bo Liu ◽  
Shi-Ming Huang
Keyword(s):  
Single Crystals ◽  
X Ray ◽  
Red Luminescence ◽  
Excited Luminescence

X-ray Excited Luminescence Yield Spectra of NaBr and NaBr:Cu Single Crystals

1993 ◽  
Vol 32 (S2) ◽  
pp. 217
Author(s):  
Takatoshi Murata ◽  
Katsuyuki Harada ◽  
Shuichi Emura ◽  
Masaharu Nomura ◽  
Karl Rudolf Bauchspiess ◽  
...  
Keyword(s):  
Single Crystals ◽  
X Ray ◽  
Luminescence Yield ◽  
Excited Luminescence
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