Elastic Constants of Rhenium Single Crystals in the Temperature Range 4.2°–298°K

The c-axis tunneling properties of both pristine Bi2212 and its HgBr 2 intercalate have been measured in the temperature range 4.2-250 K. Lithographically patterned 7-10 unit-cell heigh mesa structures on the surfaces of these single crystals were investigated. Clear SIS-like tunneling curves for current applied in the c-axis direction have been observed. The dynamic conductance d I/ d V(V) shows both sharp peaks corresponding to a superconducting gap edge and a dip feature beyond the gap, followed by a wide maximum, which persists up to a room temperature. Shape of the temperature dependence of the c-axis resistance does not change after the intercalation suggesting that a coupling between CuO 2-bilayers has little effect on the pseudogap.

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

International Journal of Modern Physics B ◽

10.1142/s0217979221501137 ◽

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.

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The Elastic Constants of the Single Crystal of the Mg-Zn-Zr-REM Alloy from the Data of the Elastic Anisotropy and the Texture of the Polycrystalline Sheet

International Journal of Metals ◽

10.1155/2014/142920 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6

Author(s):

S. V. San’kova ◽

N. M. Shkatulyak ◽

V. V. Usov ◽

N. A. Volchok

Keyword(s):

Single Crystals ◽

Young’S Modulus ◽

Elastic Constants ◽

Elastic Anisotropy ◽

Young's Modulus ◽

Rare Earth Metals ◽

Alloy Sheet ◽

Pole Figures ◽

Integral Characteristics ◽

Experimental Values

The measuring of the constants of single-crystals requires the availability of crystals of relatively big size. In this paper the elastic constants of the single crystals of magnesium alloy with zinc, zirconium, and rare earth metals (REM) were determined by means of the experimental anisotropy of Young’s modulus and integral characteristics of texture (ICT), which were found from pole figures. Using these constants the anisotropy of Young’s modulus of alloy sheet ZE10 was calculated. Deviation of calculated values from experimental values did not exceed 2%.

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Температурная зависимость ширины запрещенной зоны монокристаллов MnAgIn-=SUB=-7-=/SUB=-S-=SUB=-12-=/SUB=-

Физика и техника полупроводников ◽

10.21883/ftp.2019.12.48614.9221 ◽

2019 ◽

Vol 53 (12) ◽

pp. 1621

Author(s):

И.В. Боднарь ◽

Б.Т. Чан ◽

В.Н. Павловский ◽

И.Е. Свитенков ◽

Г.П. Яблонский

Keyword(s):

Experimental Data ◽

Temperature Dependence ◽

Band Gap ◽

Single Crystals ◽

Spinel Structure ◽

Semiconductor Materials ◽

Transmittance Spectra ◽

Temperature Range

AbstractMnAgIn_7S_12 single crystals 16 mm in diameter and ~40 mm in length are grown by planar crystallization of the melt. It is shown that the material grown crystallizes with the formation of the cubic spinel structure. From the transmittance spectra recorded in the region of fundamental absorption in the temperature range 10–320 K, the band gap E _ g of the single crystals and its temperature dependence are determined. The dependence has a shape typical of most semiconductor materials: as the temperature is lowered, the band gap E _ g increases. A calculation is carried out, and it is shown that the calculated values are in agreement with the experimental data.

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