Single crystals of undoped Li2WO4 and Li2W1-0.0125Mo0.0125O4: Formation enthalpies, heat capacity in the temperature range 320-997 K

2021 ◽  
Author(s):  
Nata Ivanovna Matskevich ◽  
V.N. Shlegel ◽  
Anna Nikolaevna Semerikova ◽  
Dmitrii Andreevich Samoshkin ◽  
Veronika D. Grigoryeva ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystals ◽  
Weight Control ◽  
Rare Events ◽  
Temperature Gradients ◽  
Czochralski Technique ◽  
Temperature Range ◽  
Formation Enthalpies

The Li2WO4 single crystal was first grown applying unique Czochralski technique with weight control and low-temperature-gradients. Single crystal of Li2WO4 is one of the perspective materials to search rare events....

scholarly journals Heat capacity of lithium tungstate single crystal by DSC calorimetry data in the temperature range of 319-997 K

2021 ◽  
Vol 2057 (1) ◽  
pp. 012048
Author(s):  
N I Matskevich ◽  
V N Shlegel ◽  
A A Chernov ◽  
D A Samoshkin ◽  
S V Stankus ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Phase Transitions ◽  
Single Crystal ◽  
Weight Control ◽  
Czochralski Technique ◽  
Temperature Range ◽  
First Time ◽  
Lithium Tungstate ◽  
Dsc Calorimetry ◽  
Calorimetry Data

Abstract The heat capacity of lithium tungstate single crystal (Li2WO4) was measured for the first time in the temperature range of 319-997 K. The experiments were carried out by DSC calorimetry. The Li2WO4 single crystal was first grown by low-temperature-gradient Czochralski technique with weight control. The temperature dependence of Li2WO4 heat capacity in the temperature range 319-997 K was monotonic. According to results of our studies, there were no phase transitions in Li2WO4 in the investigated temperature range.

scholarly journals Thermodynamic properties of single crystals based on lithium tungstate by reaction and DSC calorimetry

2021 ◽  
Vol 2119 (1) ◽  
pp. 012140
Author(s):  
N I Matskevich ◽  
V N Shlegel ◽  
D A Samoshkin ◽  
S V Stankus ◽  
A N Semerikova ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Temperature Gradient ◽  
Single Crystals ◽  
Czochralski Technique ◽  
Formation Enthalpies ◽  
Stabilization Energies ◽  
Mo Content ◽  
First Time ◽  
Lithium Tungstate ◽  
Dsc Calorimetry

Abstract For the first time, single crystals of undoped lithium tungstate and lithium tungstate doped by 1.25% molybdenum were grown by the low-temperature-gradient Czochralski technique. The standard formation enthalpies, lattices enthalpies, stabilization energies, and the heat capacity were determined in the temperature range of 320-997 K. The lattice enthalpy dependence on Mo content was constructed.

Magnetization and low temperature heat capacity of SmFeO 3 single crystal

2017 ◽  
Vol 443 ◽  
pp. 104-106 ◽  
Author(s):  
Xiaoxiong Wang ◽  
Jing Yu ◽  
Xu Yan ◽  
Yunze Long ◽  
Keqing Ruan ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Low Temperature ◽  
Single Crystal ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity

scholarly journals Теплоемкость скандобората NdSc-=SUB=-3-=/SUB=-(BO_3)-=SUB=-4-=/SUB=-

2021 ◽  
Vol 63 (12) ◽  
pp. 2226
Author(s):  
Е.В. Еремин ◽  
Н.Д. Андрюшин ◽  
И.А. Гудим ◽  
М.С. Павловский ◽  
В.Р. Титова
Keyword(s):  
Magnetic Field ◽  
Heat Capacity ◽  
Low Temperature ◽  
Single Crystals ◽  
Temperature Region ◽  
Applied Magnetic Field ◽  
Molar Heat Capacity ◽  
Group Method ◽  
Lattice Contribution ◽  
Einstein Model

Single crystals of trigonal neodymium scandoborate NdSc3(BO3)4 were grown by the group method from a solution-melt based on bismuth trimolybdate. The molar heat capacity C(T) was studied in the temperature range 2-300 K and magnetic fields up to 9 T. The experimental curve was approximated by the combined Debye-Einstein model. The lattice contribution was determined from ab-initio calculations. Schottky anomaly was observed in the low-temperature region C(T) with the applied magnetic field.

Features of the Low-Temperature Heat Capacity of Er3 –xTmxAl5O12 Garnet Single Crystals

2019 ◽  
Vol 64 (8) ◽  
pp. 811-817 ◽  
Author(s):  
E. V. Charnaya ◽  
E. V. Shevchenko ◽  
E. N. Khazanov ◽  
A. V. Taranov ◽  
A. M. Ulyashev
Keyword(s):  
Heat Capacity ◽  
Low Temperature ◽  
Single Crystals ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity

The ferromagnetic domain structure of haematite

1968 ◽  
Vol 303 (1475) ◽  
pp. 525-529 ◽  
Keyword(s):  
Low Temperature ◽  
Single Crystals ◽  
Domain Structure ◽  
Low Temperatures ◽  
Remanent Magnetization ◽  
Temperature Transition ◽  
Small Temperature ◽  
Temperature Range ◽  
Ferromagnetic Domain ◽  
Synthetic Crystals

Observations are reported of the ferromagnetic domain structure of natural and synthetic single crystals, made at temperatures close to the low temperature transition with the aid of an acetone based magnetic colloid. The domain structure of the synthetic crystals was found to change radically over a small temperature range centred around –12 °C. These changes are correlated with the measured remanent magnetization. Fairly extensive colloid patterns were found on the natural crystals at low temperatures but when the natural crystals were annealed at 1200 °C this low temperature colloid structure was no longer found.

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.

Acousto-optic properties of LiBi(MoO4)2 single crystals grown at low temperature gradients

2012 ◽  
Vol 48 (9) ◽  
pp. 936-939 ◽  
Author(s):  
B. N. Tsydypova ◽  
M. M. Mazur ◽  
A. A. Pavlyuk
Keyword(s):  
Low Temperature ◽  
Single Crystals ◽  
Temperature Gradients

Growth of Na2W2O7 Single Crystals as Possible Optical Host Material

2014 ◽  
Vol 213 ◽  
pp. 160-164 ◽  
Author(s):  
T.A. Gavrilova ◽  
N.V. Ivannikova ◽  
V.N. Shlegel ◽  
V.D. Grigorieva ◽  
S.F. Solodovnikov ◽  
...  
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Temperature Gradient ◽  
Single Crystals ◽  
Charge Compensation ◽  
Xrd Analysis ◽  
Czochralski Technique ◽  
High Quality ◽  
Phase Purity ◽  
Ce Content

High-quality Na2W2O7 single crystals have been grown by low temperature gradient Czochralski technique (LTG Cz). The phase purity of grown crystals has been verified by XRD analysis. A set of oxide compositions based on Na2W2O7 and doped with Ce and special additions for charge compensation has been prepared by solid state synthesis. The formation of Na2W2O7-based solid solutions is found at as high Ce content as ~ 5 mol%.

Kink and Crack Interfaces in Deformed 6H-SiC Single Crystals

1994 ◽  
Vol 357 ◽  
Author(s):  
X. J. Ning ◽  
P. Pirouz
Keyword(s):  
Low Temperature ◽  
Slip System ◽  
Single Crystal ◽  
Single Crystals ◽  
Basal Plane ◽  
Prism Plane ◽  
Secondary Slip ◽  
Micro Cracks ◽  
Indentation Tests ◽  
Temperature Deformations

AbstractWhen a 6H-SiC single crystal is deformed under indentation or uniaxial compression in orientations not favorable for the activation of the 1/3[1120](0001) easy glide system, the secondary slip system is activated. Additionally, for low- temperature deformations, “kinks” and/or micro-cracks form in the crystal. In this paper, experimental results on relatively lowtemperature compression and indentation tests of single crystal 6H-SiC, and the microstructure of the deformed crystals, are presented. Based on the results, the secondary slip system in 6HSiC has been determined to be 1/3[1120](1100), which may actually be a combination of alternate glide of 1/3[1120] dislocations on the (1102) and (1102) planes. Further, dislocation mechanisms for the nucleation of prism-plane and basal-plane cracks, and for the process of kinking, in deformed 6H-SiC are proposed.

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