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Showing 1 to 11 of 11 for “"diluted magnetic semiconductors"”.
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Ferromagnetism and transport in diluted magnetic semiconductors
… focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute …
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Developing spectroscopic ellipsometry to study II-VI and diluted magnetic semiconductors
… ellipsometer (RAE) to study effects of magnetic and nonmagnetic doping on the £1 and £1 + .11 band gap energies in ZnSe-based II-VI semiconductors. To remove the natural surface oxide overlayer which distorts the intrinsic dielectric response of the sample, a chemical etching technique …
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Electrical gating effects on the magnetic properties of (Ga,Mn)As diluted magnetic semiconductors
… the effects of electrostatic gating on the magnetic properties of carrier-mediated ferromagnetic Ga1−xMnxAs diluted magnetic semiconductors. (Ga,Mn)As can be regarded as a prototype material because of its strong spin-orbit coupling and its crystalline properties which can be described …
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First-principles and Many-Body Methods: Implementations and Applications to Study Spintronic Materials
Diluted magnetic semiconductors (DMSs) and magnetoresistive materials are instrumental for the development of spintronic technology. Before we are able to engineer spintronic devices, it is necessary to understand the properties of materials from which spintronic devices are made, otherwise time …
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Novel Quantum Materials for Spintronic and Opto-Electronic Applications
… instance, in spintronics, materials such as ferromagnetic half-metals, Giant Magnetoresistants (GMR), and magnetic semiconductors have been extensively studied due to their ability to manipulate the spin of electrons for applications in magnetic storage. In opto-electronics, materials such as …
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Optimization of gadolinium-doped zinc oxide films for diluted magnetic semiconductor and its effects on organic solar cell performance
Diluted Magnetic Semiconductors (DMS) are being actively studied as a major step towards the realization of spintronic devices. However, to obtain the DMS with ferromagnetic behaviour at room temperature is the main obstacle in the fabrication of spintronic devices. This obstacle has prompted …
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Current-induced torque driven ferromagnetic resonance in magnetic microstructures
… and an alternating current in a uniform ferromagnetic system. Diluted magnetic semiconductors (Ga,Mn)As and (Ga,Mn)(As,P) have been studied. Due to their strong spin-orbit coupling and well-understood band-structure, these materials are well-suited to this investigation. The combined effect of …
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Diluted Magnetic Semiconductor Cobalt and Europium Implanted ZnO Thin Film
Diluted magnetic semiconductors (DMSs) have initiated enormous scientific interests because of their potential for multifunctional spintronics devices. ZnO based semiconductors have been identified to be the promising room temperature ferromagnetic materials with a wide band-gap. However, the …
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Investigation of magnetic interactions in topological insulators
… This thesis is a comprehensive study of magnetic interactions in topological insulators, from both experimental and theoretical perspective. Generically, there are two approaches to bring TI magnetic, the proximity effect and the conventional transitional metal ion doping. In the …
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Nachweis der elektrischen Spin-Injektion in II-VI-Halbleiter mittels Messung des elektrischen Widerstandes
… n-dotierte, verdünnte magnetische Halbleiter ("diluted magnetic semiconductors", DMS) als Injektor-Materialien für die elektrische Spininjektion in Halbleiter gut geeignet sind. Im Jahr 1999 wurde darüber hinaus die elektrische Injektion von einem DMS in einem nicht magnetisch dotierten …
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Transition metal implanted ZnO: a correlation between structure and magnetism
… ferromagnetism is often found in potential diluted magnetic semiconductor systems. However, many authors question the origin of this ferromagnetism, i.e. if the observed ferromagnetism stems from ferromagnetic precipitates rather than from carriermediated magnetic coupling of ionic …