DSpace Home
→
Ortak Dersler Bölümü
→
Temel Mühendislik Ana Bilim Dalı
→
Browsing Temel Mühendislik Ana Bilim Dalı by Issue Date

Browsing Temel Mühendislik Ana Bilim Dalı by Issue Date

Now showing items 1-20 of 23

Temperature and Excitation Intensity Tuned Photoluminescence In Ga0.75In0.25Se Crystals

Işık, M.; Güler, I.; Gasanlyc, N. M. (Elsevier Science BV, 2013-01)

Photoluminescence (PL) spectra of Ga0.75In0.25Se layered single crystals have been studied in the wavelength range of 580-670 nm and temperature range of 7-59 K. Two PL emission bands centered at 613 nm (2.02 eV, A-band) ...
Calculation of the infrared frequencies as a function oftemperature using the volume data in the ferroelectric phase ofnano2

Yurtseven, H.; Kiracı, Ali (Taylor&Francis INC, 2014-02-17)

We calculate the temperature dependence of the infrared frequencies of the TO and LO modes with the symmetries of A(1), B-1 and B-2 mainly in the ferroelectric phase of NaNO2. This calculation is carried out using the ...
Damping constant and the relaxation time calculated for the lowest-frequency soft mode in the ferroelectric phase of Cd2Nb2O7

Kiracı, Ali; Yurtseven, H. (Elsevier GMBH, 2016)

The temperature dependence of the phonon frequency omega(ph) and of the damping constant Gamma(sp) due to pseudospin-phonon coupling of the lowest-frequency soft mode is calculated in the ferroelectric phase near the ...
Ring annulation versus alkylation of pyrrole with alpha-phosphoryl-alpha,beta-unsaturated ketones

Taşgın, Dilek Işık; Unaleroğlu, Canan (Pergamon-Elsevier Science LTD, 2016-09-29)

In this study; novel aryl, heteroaryl, pyrrolyl and phosphoryl groups containing pyrrolizines were synthesized by the ring annulation reaction of aryl or heteroaryl substituted alpha-phosphoryl-alpha,beta-unsaturated ketones ...
Damping Constant (Linewidth) and the Relaxation Time of the Brillouin LA Mode for the Ferroelectric-Paraelectric Transition in PbZr1-xTixO3

Yurtseven, Hamit; Kiracı, Ali (IEEE-INST Electrical Electronics Engineers INC, 2016-10)

The damping constant (linewidth) of the longitudinal acoustic (LA) mode is calculated as a function of temperature using the observed Brillouin frequencies of this mode from the literature for the ferroelectric-paraelectric ...
Temperature dependence of the polarization, dielectric constant, damping constant and the relaxation time close to the ferroelectric-paraelectric phase transition in LiNbO3

Kiracı, Ali; Yurtseven, H. (Elsevier GMBH, 2017)

We calculate the order parameter (spontaneous polarization) and the inverse dielectric susceptibility at various temperatures in the ferroelectric phase of LiNbO3 for its ferroelectric-paraelectric phase transition (T-C ...
Pressure dependence of the Raman frequency calculated from the volume data close to the ferroelectric-paraelectric transition in PbTiO3

Yurtseven, Hamit; Kiracı, Ali (Taylor&Francis, 2017)

We calculate the pressure dependence of the Raman frequencies of some Raman modes by using the observed volume data through the mode Gruneisen parameters for the ferroelectri-paraelectric transition in PbTiO3. The mode ...
Calculation of the raman frequency, damping constant (Linewidth) and the relaxation time near the tetragonal-cubic transition in PbTiO3

Kiracı, Ali; Yurtseven, H. (Elsevier GMBH, 2017)

Frequencies, damping constants and the relaxation times of some Raman modes including the two soft modes are calculated as a function of pressure near the tetragonal-cubic transition in PbTiO3. Calculation of the Raman ...
Calculation of the raman frequency, damping constant (Linewidth) and the relaxation time near the tetragonal-cubic transition in PbTiO3

Kiracı, Ali; Yuetseven, Hamit (Elsevier GMBH, 2017)

Frequencies, damping constants and the relaxation times of some Raman modes including the two soft modes are calculated as a function of pressure near the tetragonal-cubic transition in PbTiO3. Calculation of the Raman ...
Calculation of the frequency shifts and damping constant for the Raman modes (A(1g), B-1) near the tetragonal-cubic transition in SrTiO3

Kiracı, Ali; Yurtseven, Hasan Hamit (Scientific Technical Research Council Turkey-Tubitak, 2017-01)

Raman shifts of the soft mode A(1g) and the B-1 mode are calculated at various pressures at room temperature for the cubic-tetragonal transition (P-c = 9.5 GPa) in SrTiO3. This calculation is performed using the observed ...
Temperature dependence of the damping constant and the relaxation time close to the tetragonal-cubic phase transition in SrZrO3

Yurtseven, H.; Kiracı, Ali (Elsevier Science BV, 2017-01-15)

The damping constant Gamma(sp) due to the pseudospin-phonon coupling is calculated as a function of temperature using the pseudospin-phonon coupled model and the energy fluctuation model close to the tetragonal-cubic ...
Optical and photoelectrical properties of TlInSSe layered single crystals

Güler, İpek; Gasanly, N. (Elsevier GMBH, 2018)

Optical and electrical properties of TlInSSe layered single crystals have been studied by means of transmission, reflection and photoconductivity measurements. Transmission and reflection experiments have been carried out ...
Pressure-dependent Raman modes near the cubic-tetragonal transition in strontium titanate

Kiracı, Ali; Yurtseven, Hamit (Wiley, 2018-03)

The pressure dependence of the Raman frequency shifts of various Raman modes is calculated at room temperature using the volume data from the literature for the cubic-tetragonal transition in SrTiO3. The isothermal mode ...
Determination of trapping parameters of Tl2In2S3Se layered single crystal by thermoluminescence

Güler, İpek; Gasanly, Nizami (Wiley, 2018-04)

Thermoluminescence (TL) measurements are performed to evaluate the trap states in Tl2In2S3Se layered single crystals. TL experiments are conducted with varying temperature from 10 to 300 K and warming rates from 0.2 to 1.0 ...
N-phosphorylation of pyrroles: An intramolecular migration reaction

Taşgın, Dilek; Unaleroğlu, Canan (Pergamon-Elsevier Science LTD, 2018-05-16)

A new synthetic method is reported for the N-phosphorylation of pyrroles via intramolecular migration of a phosphonate diester group. The reaction proceeds under mild conditions and produces N-phosphorylated pyrrole ...
Analysis of the Specific Heat and the Free Energy of [N(Ch 3 ) 4 ] 2 Znbr 4 Close to the Ferro-Paraelastic Phase Transition

Kiracı, Ali (Taylor&Francis LTD, 2019-02-04)

A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat C p and the Gibbs free energy G of [N(CH 3 ) 4 ] 2 ZnBr 4 compound in the vicinity of the phase transition ...
Analysis of the specific heat and the free energy of [N(CH3)(4)](2)ZnBr4 close to the ferro-paraelastic phase transition

Kiracı, Ali (Taylor&Francis LTD, 2019-03-04)

A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)ZnBr4 compound in the vicinity of the phase transition temperature ...
Structural and Optical Properties of Ga2Se3 Crystals by Spectroscopic Ellipsometry

Güler, İpek; Işık, Mesut; Gasanly, Nizami Mamed; Gasanova, L. G.; Babayeva, Raziye (Springer, 2019-04)

Optical and crystalline structure properties of Ga2Se3 crystals were analyzed utilizing ellipsometry and x-ray diffraction (XRD) experiments, respectively. Components of the complex dielectric function (epsilon=epsilon(1)+i ...
Optical and structural characterization of silicon nitride thin films deposited by PECVD

Güler, İpek (Elsevier, 2019-07)

Plasma enhanced chemical vapor deposition (PECVD) technique was used to deposit silicon nitride (SiNx) thin films. The silane (SiH4) and ammonia (NH3) were used as reactant gases. Both the flow rates of the NH3 and SiH4 ...
Study of vibrational modes in (Ga2S3)(x) - (Ga2Se3)(1-x) mixed crystals by Raman and infrared reflection measurements

Erdemir, Işık Merda; Güler, İpek; Gasanly, Nizami Mamed (Elsevier, 2019-09)

Raman and infrared (IR) reflection characteristics were investigated in the frequency region of 100-450 cm(-1) for (Ga2S3)(x) - (Ga2Se3)(1-x) mixed crystals for compositions of x increasing from 0.0 to 1.0 by intervals of ...

Now showing items 1-20 of 23

Search DSpace

Advanced Search

Browse

All of DSpace
- Communities & Collections
- By Issue Date
- Authors
- Titles
- Subjects
- Type
- Language
- Department
- Publisher
- Citation
This Community
- By Issue Date
- Authors
- Titles
- Subjects
- Type
- Language
- Department
- Publisher
- Citation

Browsing Temel Mühendislik Ana Bilim Dalı by Issue Date

Browsing Temel Mühendislik Ana Bilim Dalı by Issue Date

Search DSpace

Browse

All of DSpace

This Community

My Account