Co substitution in hexaferrites Sr1−xCoxFe12O19 compounds with doping values x = 0.0, 0.075, 0.15, 0.225 and 0.30 were prepared using microwave digestion system. Structural, morphological, magnetic and dialectic properties were investigated. X-ray diffraction pattern proved a hexagonal phase (SrFe12O19) existing as a main phase for all samples. The lattice parameters, crystallites size and other parameters such as microstrain and direct ... Read more

The current work focused on studying the optical and structural properties of (CdS)1-x (ZnS)x thin films fabricated by thermal vacuum evaporation approach. The evaporation was implemented at room temperature from bulk samples synthesis by sintering approach. The energy gap, index of refraction, extinction coefficient and absorption coefficient were estimated from the experiment and employed in our theoretical model to estimate ... Read more

Cadmium Selenide, CdSe, thin films deposited on different substrate types; FTO/glass,/glass, and ITO/glass substrates were produced by thermal evaporation method in the room temperature. The influence of different types of substrates on the structural, optical and electrical properties of the films was studied by X-ray diffraction and absorption photo spectroscopy respectively. X-ray diffractions revealed that all the CdSe films have ... Read more

The Monte Carlo Antiferromagnetic Ising model was used to study the electrical properties and magnetoresistance of manganese oxides due to the charge ordering phase occurring at half doping, _x = 0.5_. The half-doped manganites have an insulator antiferromagnetic ground state. The internal energy, specific heat, resistivity, the magneto-resistance and magnetization have been investigated with different applied magnetic fields. Our simulation ... Read more

In this report, we investigate the optical and electrical properties of aluminum zinc oxide (AZO) thin films using magnetron sputtering method in preparing the thin films and spectrophotometer to measure the optical characteristics. The X-ray diffraction (XRD) patterns of the films are found to have amorphous structure. The optical band gap _E_g, refractive index _n_, electronic polarizability, carrier concentration _N_c, ... Read more

الهدف من المقرر: * تعلم المفاهيم الأساسية لعلم الفيزياء * يتعرف الطالب على الكميات الفيزيائية ووحداتها * تزويد الطالب بقواعد أساسية لفهم أساسيات علم الكهرباء * تهيئة الطالب لإستنباط علاقات جديدة تخدم هذا العلم * تعريف الطالب طبيعة وخواص بعض الظواهر الكهربية وتمكينه من تفسيرها عمليا ونظريا * تهيئة الطالب للقراءة والاطلاع لمعرفة تخصصات فيزياء جديدة وتطبيقاتها Read more

Introduction We will pay our attention to the study of thermodynamics, which involves situations in which the temperature or state (solid, liquid, gas) of a system changes due to energy transfers. As we shall see, thermodynamics is very successful in explaining the bulk properties of matter and the correlation between these properties and the mechanics of atoms and molecules. Read more

Exercises 1 - Distinguish between fundamental and derived units. Give examples. 2- Give the SI units in which the following physical quantities are measured : Frequency, magnetic flux, density, magnetic flux and inductance. 3- Derive the dimensions of: (1) surface tension (2) viscosity (3) gravitational constant and (4) moment of inertia. 4- Discuss the uses of dimensional analysis. 5- What ... Read more