Lattice constant

Part 1 book "Introduction to solid state physics" includes contents: Crystal structure, wave diffraction and the reciprocal lattice, crystal binding and elastic constants, phonons i - crystal vibrations, phonons ii - thermal properties, free electron fermi gas, energy bands, semiconductor crystals, fermi surfaces and metals, superconductivity.

316p dianmotminh01 17-05-2024 5 3   Download

Part 1 book "Mathematical foundation of computer science" includes content: Discrete theory, relations and functions; discrete numeric functions and generating functions; recurrence relations with constant coefficients; algebraic structure; propositional logic; lattice theory.

183p oursky02 07-08-2023 5 4   Download

Two copper phyllosilicates were prepared via co-precipitation accompanied by hydrothermal treatment at pH constant. The obtained materials were physically characterized by XRD, H2-TPR, TEM, BET and XPS techniques. The results indicated that Cu(II) ions were successfully intercalated into the phyllosilicate framework at a low Cu/Si molar ratio.

6p viberbers 09-08-2023 4 3   Download

The electric and magnetic properties of a lithium ferrite (LF) synthesized using the solid state reaction technique have been reported. The XRD studies reveal the cubic nature, from which the crystallite size and the lattice constant are determined to be 16.84 nm and 2.847 Å repectively. The FESEM confirms the coarseness in the samples with a low porosity.

6p viberbers 09-08-2023 6 3   Download

In this study, trivalent La and Y, which feature large solubility limits of more than 20 at% in CeO2, are selected as dopants, and the transfer energy of the oxygen vacancy according to the change in the lattice constant of CeO2 is investigated.

5p viberbers 09-08-2023 5 3   Download

Dy and Ho iron garnets in form of nanoparticles were synthesized by citrate sol-gel method. Phase formation, lattice constant and average crystallite sizes of the samples were determined via XRD measurements.

7p viberbers 09-08-2023 6 3   Download

Temperature and pressure dependence of lattice constants of a cubic Strontium Titanate (SrTiO3) has been investigated using the statistical moment method. The lattice constants at various temperatures is derived in closed analytic form by including the anharmonic effects of the lattice vibrations explicitly.

10p viberkshire 09-08-2023 11 5   Download

Purpose: The purpose of thesis is to study the influence of temperature, pressure and dopant on the diffusion coefficient and ionic conductivity of the bulk material as CeO2, c-ZrO2, YDC and YSZ. For YDC and YSZ thin films, we find the thickness dependence of the lattice constant, diffusion coefficient and ionic conductivity

28p tunelove 10-06-2021 10 2   Download

Composites of Ba1-xLaxFe12O19/polyaniline were successfully prepared. By using X-ray diffractometer, the secondary phase of α-Fe2O3 was detected besides the main phase of Ba1-xLaxFe12O19. Phase percentage of α-Fe2O3 increased with the increase of La doping concentration. Lattice parameters, a and c, of the main phase were decreased with respect to the increase of the La doping concentration, x. The decrease of a and c could be attributed to the substitution of small ionic of La3+ to the larger one of Ba2+.

9p nguaconbaynhay12 01-06-2021 4 1   Download

In this paper, the moment method in statistical dynamics (SMM) is used to study the thermodynamic quantities of AlyGa1-yAs/GaAs systems taking into account the anharmonicity effects of lattice vibrations. The nearest neighbor distance, lattice parameter, isothermal bulk modulus, specific heats at the constant volume and pressure of AlyGa1-yAs/GaAs systems are calculated as functions of the temperature and concentration of Al by using the many-body potential.

8p tamynhan9 02-12-2020 12 3   Download

Some thermodynamic quantities of ZrxCe1-xO2/CeO2 systems are investigated by using the moment method in statistical dynamics taking into account the anharmonicity effects of lattice vibrations. The analytic expression of the Gibbs free energy, Helmholtz free energy, and specific heats at the constant volume of ZrxCe1-xO2/CeO2 systems are obtained.

11p tamynhan9 02-12-2020 12 1   Download

In the present study, the influence of temperature and the size of the lattice constant of CeO2 thin film have been studied using three different interatomic potentials. We discuss temperature and thickness dependence of the lattice constant of CeO2 thin films and we compare our calculated results with those of the experimental results.

9p tamynhan8 04-11-2020 15 2   Download

In this paper, we present the results of the study of the effect of residual La on crystal structure, magnetic properties of La1+ơFe11.05Si1.95 (ơ= 0.00; 0.03; 0.06 and 0.09) compounds. The analysis of X-ray diffractions showed that when the La content increases to 9, the structure still remains cubic in a typical NaZn13 arrangement with unchanged lattice constant (about 0.5).

6p tamynhan6 14-09-2020 26 3   Download

In the present study, we developed a formalism based on the statistical moment method (SMM) for pure ceria crystal using the Bukingham potential for investigation of the lattice constant and elastic moduli of yttria-doped ceria crystal including the anharmonicity effects of thermal lattice vibrations. The lattice constant and elastic moduli are calculated as functions of the dopant concentration, temperature and pressure. Our results predict that the lattice constant and elastic moduli decrease rapily with the pressure in agreement with experimental results (in the case pure ceria).

8p koxih_kothogmih5 04-09-2020 13 2   Download

The lattice parameter and cell volume are in resemblance trend with the variation of the dopant concentration. The similar trend is observed for the crystallite and particle size. The porosity and sintered density, however, vary in an opposite way with a variation of the dopant concentration. The same variation is found for the drift mobility and DC resistivity.

9p tamynhan4 06-09-2020 14 3   Download

The characteristics of photonic crystal fibers (PCFs) with various air hole diameters infiltrated with alcoholic liquids such as ethanol, methanol, propanol and butanol are numerically investigated. Based on the numerical results, we have analyzed and compared in detail the characteristics of these fibers including effective refractive index, effective mode area, dispersion and confinement loss for two sets of parameters {d,Λ} = {1 µm,5 µm} and {1.42 µm, 3.26 µm}, with d the air hole diameter and Λ the lattice constant, respectively.

12p nguyenxuankha_bevandan 14-08-2020 22 4   Download

Zinc hydroxyapatite coatings (ZnHAp) were synthesized on 316L stainless steel by ion exchange method between hydroxyapatite coatings (HAp) and solution containing Zn(NO3)2. Effect of the initial concentration of Zn2+ and contact time to ion exchange process was studied. The analytical results of FTIR, SEM, Xray, and AAS showed that the obtained coatings were single phase crystals of HAp, and the present of Zn in HAp structure with the atomic ratios of Zn/Ca, (Ca + Zn)/P of 0.143 and 1.707 changed the morphology, the crystal diameter and the lattice parameters.

9p nguathienthan6 06-07-2020 18 1   Download

The amounts of K release in successive extraction with hot 1N HNO3 decreased consistently and reached to plateau at 6th to 8th extractions in the soils. The K release in the 1 st extraction was 452.6 to 890.9 mg/kg, whereas at 9th extraction it was 8.2 to 13.1 mg/kg. The step K contents of the soils varied from 663.2 to 1452.7 mg/kg. The ratio of step K to non-exchangeable K of the soil was in the range of 1.22 to 1.38 which may be used as a better index of mobilization of non-exchangeable K reserves to plants.

10p chauchaungayxua6 26-06-2020 13 1   Download

Analytical expressions for the Morse potential parameters for fcc, bcc and hcp crystals have been developed. They contain the energy of sublimation, the compressibility and the lattice constant. Numerical results for Cu (fcc), W (bcc) and Zn (hcp) agree well with the measured values. Debye-Waller factors in X-ray absorption fine structure (XAFS) and equation of state computed using the obtained Morse potential parameters agree well with the experimental results.

8p 12120609 01-06-2020 16 2   Download

The moment method in statistical dynamics is used to study the equation of state and thermodynamic properties of the bcc metals taking into account the anharmonicity effects of the lattice vibrations and hydrostatic pressures. The explicit expressions of the lattice constant, thermal expansion coefficient, and the specific heats of the bcc metals are derived within the fourth order moment approximation.

16p 12120609 01-06-2020 12 0   Download