Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"magneto-resistance"”.
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Automatic Esophageal Intubation Detection Using Giant Magneto Resistance Sensors
… intubation detector. This device uses a giant magneto recitative sensor to and a magnetized stylet to automatically measure the position of an ET tube in a person's throat. This method is less subjective than currently used methods such as end tidal CO2, as it does not rely on user …
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Transport studies on CVD-grown graphene
… in magnetic field sweeps. Finally, we study magneto-resistance effects at low fields, and find that the sample exhibits weak-localization effects.
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Electrodeposition of multilayered nanostructures for giant magnetoresistance and thermoelectric applications
… materials such as multilayer nanotubes for giant magneto resistance (GMR) applications and bismuth telluride nanotubes for thermoelectric applications are presented in this dissertation. The motivation for the multilayer electrodeposition is the investigation of giant magnetoresistance (GMR), a …
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Topological Transport in Sb Quantum Wells
… (EBL) and reactive ion etching (RIE). Magneto-transport and quantum interference experiments were then conducted. To better understand the effects seen in magneto-transport measurements, classical magneto-transport and quantum interference theory is covered. The classical …
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Preparation and Characterization of Magnetic Nanocomposite in a Polymer Matrix By Ion Implantation
… of the ferromagnetic metals should enhance the magneto resistance of the material and also produce semiconductor behavior. The samples consist of a polymer, poly-ether-ether-ketone (PEEK), implanted with Iron, Nickel, or Cobalt. Thus, creating a nanoparticle embedded into a polymer matrix. …
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Resistivity anomalies for ferromagnetic metals at Curie points
… is an ansatz in solid state physics that if the magneto-resistance can be explained by the realistic itinerant model, the localized model should give the same result.</p> <p>In this work, we use the itinerant model to treat the spin correlation function. Using the second quantization techniques …
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Wireless chemical sensing schemes using environmentally sensitive hydrogels
… which can be remotely detected by a giant magneto resistance (GMR) sensor, and 3) a variation of microbubble-density inside of the hydrogel, which can be evaluated using an ultrasound imaging equipment. The primary engineering contributions of this research includes design, fabrication, and …
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Simulations of ferromagnetic nano structures
… the transport properties via the Anisotropic Magneto Resistance (AMR) signal of connected rings arrays using the multi-physics features of Nmag. The simulations use a self-consistent approach to determine the AMR values, a technique able to explain experimental AMR measurements of real …
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Ultrafast photoinduced phase transitions in complex materials probed by time-resolved resonant soft x-ray diffraction
… changes of macroscopic properties (colossal magneto resistance, superconductivity, metal-to-insulator transitions) often accompanied by nanoscale order of spins, charges, orbital occupation and by lattice distortions, which make these material attractive. Magnetite served as a prototype for …
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Giant Magnetoresistance in Multilayers
… multilayer systems is responsible for the giant magneto-resistance effect (GMR) and how GMR depends on the various parameters of the samples. The band structure was taken into account through a realistic third-nearestneighbor tight-binding model with s, p and d orbitals. The Landauer-Biittiker …
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Model calculations of current and density distributions in dissipative Hall bars
… us to calculate the Hall and the longitudinal resistance as continuous functions of the magnetic field B, with plateaus of finite widths and the well-known, exactly quantized values. We emphasize the close relation between these plateaus and the existence of incompressible strips, and we show …
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Quantum Hall transport in graphene and its bilayer
… observed insulating behavior in the two terminal resistance of the 𝝂 = 0 state at high fields. For monolayer graphene, we report on magneto-resistance measurements at the broken-symmetry of the zero-energy Landau level, using both a conventional two-terminal measurement of suspended graphene …
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Zinc Oxide based Diluted Magnetic Semiconductors
During my graduate research I have synthesized materials known as diluted magnetic semiconductors (DMS) as epitaxial thin film structures using the process of pulsed laser deposition (PLD). These materials are envisioned to be of importance in the emerging field of spintronics where the charge as …
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Integration eines Fahrzeugniveausensors in ein Gummi-Metall-Lager eines Fahrwerklenkers
… mechatronischen System wird mit anisotropen magnetoresistiven (AMR) Sensoren, welche in den Lagerkern integriert sind, die Richtung des Magnetfeldes eines auf der Innenseite der äußeren Lagerhülse angeordneten Perma¬nentmagnetrings gemessen. Ein spezielles Design von Mechanik und Magnetfeld …