In our work we have calculated the electronic and magnetic structural properties of the Ge1-xTMxTe alloy (MT=Mn, Fe) in the NaCl structure for concentrations (0 x 1), which was carried out using the liniarized plane wave method(FP-LAPW+lo) based on density functional theory(DFT) and we used the GGA approximation. The structural properties (a, B, B') are determined from the total energy, and our results are in good agreement with other calculations. Analysis of the band structure and density of state for a concentration of x=0.125 and x=0.25 showed that GeMnTe is a narrow-gap semiconductor,...

Dans notre travail nous avons calculé les propriétés structurales électroniques et magnétiques de l'alliage Ge1-xTMxTe (MT=Mn, Fe) dans la structure NaCl pour des concentrations (0 x 1), qui a été effectué en utilisant la méthode des ondes planes liniarisés (FP-LAPW+lo) basé sur la théorie de la densité fonctionnelle (DFT) et nous avons utilisé l'approximation GGA. Les propriétés structurales (a, B, B') sont déterminées à partir de l'énergie totale, nos résultats sont en bon accord avec les autres calculs. L'analyse de la structure de bande et la densité d'état pour une...

This book covers the fundamental concepts of solar radiation and its journey from the sun to the Earth, including topics such as terrestrial coordinates, the movement of the sun, and the various components of solar radiation, among others. Solar irradiation depends on several factors, including sunshine, temperature, geographical location, time of day, and the nature of present clouds. Numerous research efforts have been conducted to estimate ground-level solar irradiation, which is essential for sizing solar installations, predicting solar radiation, and assessing solar potential. It is also...

Ce livre couvre les concepts fondamentaux du rayonnement solaire et de son trajet du soleil à la Terre, y compris des sujets tels que les coordonnées terrestres, le mouvement du soleil et les différentes composantes du rayonnement solaire, entre autres. L'irradiation solaire dépend de plusieurs facteurs, notamment l'ensoleillement, la température, la situation géographique, l'heure de la journée et la nature des nuages présents. De nombreux efforts de recherche ont été menés pour estimer l'irradiation solaire au niveau du sol, essentielle au dimensionnement des installations...

This book explores the four forms of solar energy: photovoltaic, thermal, thermodynamic and passive solar energy, a solution not to be overlooked! It presents the basic principles, how they work, their applications, and their potential for integration in various environments. Through case studies, this book guides the reader through the challenges of optimizing the capture and use of solar energy. It also emphasizes the importance of energy efficiency, sustainability and innovation in the development of solar systems, in order to contribute to a cleaner, more responsible energy future. And at...

Dieses Buch zielt darauf ab, die vier Formen der Sonnenenergie zu erkunden, insbesondere Photovoltaik, Wärmeenergie, Thermodynamik und die passive Sonnenenergie, die eine nicht zu vernachlässigende Lösung darstellt! Es werden die Grundprinzipien, die Funktionsweise, die Anwendungen und das Potenzial für die Integration in verschiedene Umgebungen erläutert. Anhand von Fallstudien führt das Buch den Leser zum Verständnis der Herausforderungen, die mit der Optimierung der Erfassung und Nutzung von Sonnenenergie verbunden sind. Außerdem wird die Bedeutung von Energieeffizienz,...

The sun offers us its beautiful rays of light every day: let's make the most of them!This book aims to explore the four forms of solar energy, including photovoltaic, thermal, thermodynamic and passive solar energy which is a solution not to be overlooked! It presents the basic principles, their operation, their applications, and their potential for integration in various environments. Through case studies, this book guides the reader in understanding the challenges related to optimizing the capture and use of solar energy. It also emphasizes the importance of energy efficiency,...