Features of the photoconductivity of the quasi-one-dimensional compound TiS3

2021 ◽  
Author(s):  
S.A. Nikonov ◽  
I.G. Gorlova ◽  
S.G. Zybtsev ◽  
V.Ya. Pokrovskii
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Wide Temperature Range ◽  
Direct Evidence ◽  
Nonlinear Conductivity ◽  
One Dimensional ◽  
Temperature Range ◽  
Near Ir ◽  
Linear And Nonlinear ◽  
Magnetic Conductivity

Problem formulating. The features of linear and nonlinear conductivity, magnetic conductivity, thermopower, and the Hall effect observed on TiS3 whiskers indicate phase transitions to a state of CDW in this compound, but there is no direct evidence yet. The study of photoconductivity would allow us to learn more about the nature of these phase transitions. Goal. Study of the effect of radiation in the range from near-IR to near-UV on the conductivity of single-crystal TiS3 whiskers at 4.2 <T<300 K and search for features of photoconductivity in the temperature range of the suggested phase transitions. Result. Features of the photoconductivity of TiS3 at temperatures of 50 K and 15 K, at which the −dlnσ/d(1/T) maxima were previously observed, are found. A decrease in photoconductivity at these temperatures indicates a change in the electronic spectrum, which may be associated with the formation of CDW. Practical meaning. In the case of developing TiS3-based photosensors, it is important to study the photoconductivity in a wide temperature range.

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.

Elastic Constants in C-plane of Single Crystal Bi 2Sr 2Ca Cu 208 between 80 K and 260 K

1990 ◽  
Vol 193 ◽  
Author(s):  
Jin Wu ◽  
Yening Wang ◽  
Yifeng Yan ◽  
Zhongxian Zhao
Keyword(s):  
Shear Modulus ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants ◽  
Wide Temperature Range ◽  
Sound Propagation ◽  
Anisotropic Elasticity ◽  
Ultrasonic Velocities ◽  
Temperature Range

ABSTRACTThe temperature dependence of the in-plane C11 C22. C12 and C66 modes between 80 and 260 K of superconducting crystals of Bi2Sr2Ca1Cu208 have been obtained via the measurements of ultrasonic-velocities. The anisotropic elasticity in the a-b plane of single crystal Bi2 Sr2Ca1Cu2O8 is manifest. The shear modulus of sound propagation along the [110] with the polarization has been also calculated and shows an overall trend of softening over a wide temperature range above Tc. The shear modulus C6 6 shows three obvious softening minima around 240–250 K, 150 K and 100 K.

Thermal Diffusivity of 16Kh12V2FTaR Steel in a Wide Temperature Range

2013 ◽  
Vol 8 (3) ◽  
pp. 163-167
Author(s):  
Alibek Agazhanov ◽  
Igor Savchenko ◽  
Dmitriy Samoshkin ◽  
Sergey Stankus ◽  
Olga Dutova
Keyword(s):  
Phase Transitions ◽  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Curie Point ◽  
Martensitic Steel ◽  
Laser Flash ◽  
Austenite Phase ◽  
Laser Flash Method ◽  
Flash Method ◽  
Temperature Range

Thermal diffusivity of the ferritic-martensitic steel 16Kh12V2FTaR in the temperature range from 296 to 1274 K has been measured by the laser flash method with the error of 2–4 %. The approximating equations have been obtained, the Curie point of steel and the temperatures of martensitic-austenite phase transitions have been determined

Study on Thermal Hysteresis of Elastic Modulus in Granular Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O

1990 ◽  
Vol 195 ◽  
Author(s):  
Yening Wang ◽  
Linhai Sun ◽  
Jin Wu ◽  
Min Gu
Keyword(s):  
Elastic Modulus ◽  
Single Crystal ◽  
Pore Size ◽  
Wide Temperature Range ◽  
Thermal Hysteresis ◽  
Coarse Grained ◽  
First Order ◽  
Temperature Range

ABSTRACTA large thermal hysteresis ( > 100 K) of elastic modulus was measured for coarse grained Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O. Whereas, only a small thermal hysteresis (2∼3 K) near the velocity minima at 240 K, and 150 K was observed in Bi2 Sr2 CaCu2 O8 single crystal, which were found to be associated with phaselike transitions (PLT). The investigations of isothermal recovery of modulus for coarse grained YBCO and BSCCO disclose that the large thermal hysteresis may be attributed to the defects of pore size generated in the interconnecting region between grains as a result of PLT of weak first order but covering a wide temperature range. The mechanism of a large thermal hysteresis for coarse grained samples has been discussed in detail.

scholarly journals Thermal stimulated current response in cupric oxide single crystal thin films over a wide temperature range

2016 ◽  
Vol 50 (3) ◽  
pp. 035303
Author(s):  
Kungan Yang ◽  
Shuxiang Wu ◽  
Fengmei Yu ◽  
Wenqi Zhou ◽  
Yunjia Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Wide Temperature Range ◽  
Cupric Oxide ◽  
Current Response ◽  
Temperature Range

Investigation of the Structural Phase Transitions in LiKS04 in a Wide Temperature Range

1986 ◽  
Vol 96 (1) ◽  
pp. 25-31 ◽  
Author(s):  
A. M. Balagurov ◽  
B. Mroz ◽  
N. C. Popa ◽  
B. N. Savenko
Keyword(s):  
Phase Transitions ◽  
Wide Temperature Range ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
Temperature Range

Electro-caloric effect in a BCZT single crystal

CrystEngComm ◽  
2018 ◽  
Vol 20 (11) ◽  
pp. 1597-1602 ◽  
Author(s):  
Donglin Liu ◽  
Qiang Li ◽  
Qingfeng Yan
Keyword(s):  
Curie Temperature ◽  
Single Crystal ◽  
Wide Temperature Range ◽  
Temperature Range ◽  
Caloric Effect

The electro-caloric effect of the [001]-oriented (Ba,Ca)(Zr,Ti)O3 (BCZT) single crystal was investigated in a wide temperature range from −100 °C to Curie temperature (122 °C).

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