Dislocation Mobility in HCL-Doped Ice

1994 ◽  
Vol 375 ◽  
Author(s):  
Xiaohong Hu ◽  
Kunlun Jia ◽  
Fuping Liu ◽  
Ian Baker ◽  
David Black
Keyword(s):  
Single Crystals ◽  
Dislocation Velocity ◽  
Dislocation Mobility ◽  
Philosophical Magazine ◽  
X Ray ◽  
Temperature Range ◽  
Basal Dislocation

AbstractDislocation velocities have been measured in both lightly and heavily HCl-doped ice single crystals using synchrotron-based, monochromatic X-ray topography. In the temperature range −10°C to −30°C, a concentration of ˜1 × 10−6M was found not to affect the mobility of either 60° or screw basal dislocations, confirming the earlier observations of C. Shearwood and R. W. Whitworth [Philosophical Magazine A65, 1992, 85]. However, heavier doping (˜1.9 × 10−4M) increased the basal dislocation velocity, compared to pure ice, by a factor of 2.6 at −16.4°C.

Structural-phase transition in (Cu2Te)2−x(ZnTe)x at high temperature

2021 ◽  
pp. 2150113
Author(s):  
H. B. Gasimov ◽  
R. M. Rzayev
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
High Temperature ◽  
Single Crystals ◽  
Structural Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Range ◽  
Xrd Study ◽  
Xrd Method

Cu2Te single crystal was grown by the Bridgman method. X-ray diffraction (XRD) study of Cu2Te single crystals in the temperature range of 293–893 K was performed and possible phase transitions in the mentioned range of temperature have been investigated. (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals also were grown with [Formula: see text], 0.05, 0.10 concentrations and structural properties of the obtained single crystals were investigated by the XRD method in the temperature range 293–893 K. Lattice parameters and possible phase transitions in the mention temperature range were determined for (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals for [Formula: see text], 0.05, 0.10 concentrations.

Crossover from classical to 3d-Ising critical behaviour near the antiferrodistortive phase transition of lawsonite

2005 ◽  
Vol 220 (8) ◽  
Author(s):  
Wilfried Schranz ◽  
Andreas Tröster ◽  
Manuel Gardon ◽  
Gerhard Krexner ◽  
Manfred Prem ◽  
...  
Keyword(s):  
Phase Transition ◽  
Single Crystals ◽  
Wide Temperature Range ◽  
Critical Behaviour ◽  
X Ray ◽  
Temperature Range ◽  
X Ray Scattering ◽  
Ray Scattering

AbstractResults of X-ray scattering intensities and peak profiles of lawsonite single crystals are presented in a wide temperature range including the antiferrodistortive phase transition

scholarly journals Исследование спинового перехода в монокристалле LaCoO-=SUB=-3-=/SUB=- методом рентгеновского магнитного кругового дихроизма на K- и L-=SUB=-2,3-=/SUB=--краях кобальта

2018 ◽  
Vol 60 (2) ◽  
pp. 283
Author(s):  
В.В. Сиколенко ◽  
И.О. Троянчук ◽  
Д.В. Карпинский ◽  
A. Rogalev ◽  
F. Wilhelm ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Magnetization Curve ◽  
Magnetic Circular Dichroism ◽  
Spin Transition ◽  
Orbital Momentum ◽  
Cobalt Ions ◽  
X Ray ◽  
Temperature Range ◽  
Circular Dichroïsm

AbstractSpin transitions of cobalt ions in LaCoO_3 single crystals have been studied by the method of X-ray magnetic circular dichroism (XMCD) at the K - and L _2,3-edges of Co^3+ ions. The orbital momentum of cobalt ions obtained for the K -edge at the 3 d level in the region of the spin transition in the temperature range from 25 to 120 K increases by a factor of approximately 1.6, whereas the slope of the magnetization curve value in the same temperature range and magnetic field increases by a factor of more than 10. XMCD experiments at the cobalt L _2,3-edges demonstrate gradual growth of the ratio of the orbital momentum to the spin one L / S from 0.48 to 0.53 in the temperature range from 60 K to 120 K.

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.

scholarly journals The Debye Temperature for Hydrothermally Grown ThO2 Single Crystals

2013 ◽  
Vol 1576 ◽  
Author(s):  
Tony D. Kelly ◽  
James C. Petrosky ◽  
John W. McClory ◽  
Timothy Zens ◽  
David Turner ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Single Crystals ◽  
Debye Temperature ◽  
Oxidation State ◽  
Core Level ◽  
Photoemission Spectroscopy ◽  
Temperature Dependent ◽  
X Ray ◽  
Temperature Range

ABSTRACTThe electronic properties of ThO2 single crystals were studied using x-ray photoemission spectroscopy (XPS). The XPS results show that the Th 4f core level is in an oxidation state that is consistent with that expected for Th in ThO2. The effective Debye temperature is estimated from the temperature dependent photoemission intensities of the Th 4f core level over the temperature range of 290 to 360 K. A Debye temperature of 468±32 K has been determined.

scholarly journals Basal dislocation mobility in zinc single crystals

1967 ◽  
Vol 2 (1) ◽  
pp. 37-47 ◽  
Author(s):  
K.H Adams ◽  
T Vreeland ◽  
D.S Wood
Keyword(s):  
Single Crystals ◽  
Dislocation Mobility ◽  
Basal Dislocation

scholarly journals The Dependencies of X-Ray Conductivity and X-Ray Luminescence of ZnSe Crystals on the Excitation Intensity

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
V. Ya. Degoda ◽  
M. Alizadeh ◽  
N. O. Kovalenko ◽  
N. Yu. Pavlova
Keyword(s):  
Theoretical Analysis ◽  
Single Crystals ◽  
Radiation Intensity ◽  
Excitation Intensity ◽  
Semiconductor Material ◽  
X Ray ◽  
Temperature Range ◽  
Deep Traps ◽  
Shallow Traps

This work studies the conductivity and luminescence of ZnSe single crystals under X-ray irradiation. The experimentally derived lux-ampere characteristics of the X-ray conductivity for ZnSe crystals have a sublinear behavior within the temperature range from 8 to 420 K. The theoretical analysis of the conductivity kinetics at X-ray excitation showed that the value of maximum accumulated lightsum at deep traps does not depend on radiation intensity. However, regarding shallow and phosphorescent traps, the strength of accumulated lightsum depends on the intensity of exciting irradiation. Specifically, these shallow traps and phosphorescent traps cause the sublinear behavior of lux-ampere characteristics in the semiconductor material.

X-RAY-IRRADIATED KTiOPO4: ESR STUDIES

1992 ◽  
Vol 06 (03) ◽  
pp. 177-181 ◽  
Author(s):  
BORIS V. ANDREEV ◽  
VLADIMIR N. EFIMOV
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
X Ray ◽  
Temperature Range ◽  
First Time ◽  
Paramagnetic Centres

The study of radiation paramagnetic centres (RPC) arising in flux-grown KTiOPO 4 (KTP) single crystals at X-ray-irradiation at 300 K was conducted by the ESR-method in the temperature range of 3.7÷300 K . For the first time in X-ray-irradiated KTP there were found electron and hole RPC stable at room temperature and related to Ti 3+ and Al 3+ impurity, respectively.

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