ANALYSIS OF THE INTEGRATED INTENSITY OF THE CENTRAL PEAKS CALCULATED AS A FUNCTION OF TEMPERATURE IN THE FERROELECTRIC PHASE OF LITHIUM TANTALATE

Date

2018-01-01

Author

Kiraci, Ali
Yurtseven, Hasan Hamit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

148
views

0
downloads

The integrated intensity of the central peak is calculated as a function of temperature in the ferroelectric phase (T < T-C) of nearly stoichiometric LiTaO3. This calculation is performed using the temperature dependence of the order parameter obtained from the mean field theory at temperatures lower than the transition temperature T-C (T-C = 963 K) of this crystal. The calculated values of the order parameter (squared) are fitted to the integrated intensity of the central peaks as observed from the Raman and Brillouin scattering experiments as reported in the literature in the ferroelectric phase of nearly stoichiometric LiTaO3. Our results are in good agreement with the observed behavior of LiTaO3 crystal. Because of the applications of LiTaO3 in several academic disciplines including the material science and thermal science, it is beneficial to investigate dynamic properties of this crystal such as the damping constant, inverse relaxation time and the activation energy as also we studied here.

Subject Keywords

Renewable Energy, Sustainability and the Environment

URI

https://hdl.handle.net/11511/57190

Journal

THERMAL SCIENCE

DOI

https://doi.org/10.2298/tsci170614289k

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Analysis of the Integrated Intensity of the Central Peaks Calculated as a Function of Temperature in the Ferroelectric Phase of Lithium Tantalate. Kiracı, Ali; Yurtseven, Hasan Hamit (null; 2017-04-29) The integrated intensity of the central peak is calculated as a function of temperature in the ferroelectric phase (T<TC) of nearly stoichiometric LiTaO3. This calculation is performed using the temperature dependence of the order parameter obtained from the mean field theory (MFT) at temperatures lower than the transition temperature TC (TC= 963 K) of this crystal. The calculated values of the order parameter (squared) are fitted to the integrated intensity of 92 the central peaks as observed from the Ram...
Investigation of Porosity and Permeability Impairment in Sandstones by X-ray Analysis and Simulation Iscan, A. G.; Kök, Mustafa Verşan; Civan, F. (Informa UK Limited, 2009-01-01) Both porosity and permeability constitute the major parameters in core analysis. In this study, the variation of these two parameters along a sandstone core sample was investigated during formation damage. A water-based drilling fluid was dynamically circulated through the core sample for three different time intervals of 15 min, 45 min, and 60 min at 100 psi circulation pressure. The core sample was analyzed using x-ray digital radiography by sectional image approach. The differences in the porous media du...
TEMPERATURE-DEPENDENT ELECTRICAL CHARACTERISTICS OF AL-SIOX-PSI SOLAR-CELLS OZDEMIR, S; ALTINDAL, S (Elsevier BV, 1994-02-01) Current-voltage (I-V) and capacitance-voltage (C-V) characteristics of Al-SiOx-pSi metal-insulator-semiconductor (MIS) solar cells were measured in the temperature range between 295 K and 375 K. The semilogarithmic plot of the dark forward current-voltage curves were found to be linear and the slope was almost independent of temperature in the intermediate voltage region. Consequently, the diode quality factor was strongly temperature dependent changing linearly with inverse temperature. A decrease in the z...
Modeling the discharge behavior of a lithium-sulfur battery Erisen, Nisa; Eroglu, Damla (Wiley, 2020-10-01) In lithium-sulfur (Li-S) batteries, the discharge performance depends greatly on a number of cell design parameters because of the complex reaction mechanisms in the cathode. Electrolyte-to-sulfur (E/S) ratio and carbon-to-sulfur (C/S) ratio in the cell are key examples of these critical design factors that define the Li-S battery performance. Here, a 1-D electrochemical model is reported to calculate the dependence of the discharge behavior of a Li-S battery on the E/S and C/S ratios. Proposed model descri...
Comparisons and critical assessment of global and diffuse solar irradiation estimation methodologies Karaveli, Abdullah Bugrahan; Akınoğlu, Bülent Gültekin (Informa UK Limited, 2018-01-01) Defining better methodologies of accurate predictions of the amount of monthly mean daily global and diffuse solar irradiation exposed is of utmost importance in order to determine the potential for utilizing the solar energy. This study compares and discusses the main methodologies, databases, and software that are used in estimating the solar irradiation to be used for the short- and long-term performances and feasibilities of solar energy systems, especially photovoltaic power plants in Turkey, and addre...

Citation Formats

A. Kiraci and H. H. Yurtseven, “ANALYSIS OF THE INTEGRATED INTENSITY OF THE CENTRAL PEAKS CALCULATED AS A FUNCTION OF TEMPERATURE IN THE FERROELECTRIC PHASE OF LITHIUM TANTALATE,” THERMAL SCIENCE, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57190.