نتایج جستجو برای: giant magneto resistance
تعداد نتایج: 440732 فیلتر نتایج به سال:
We have studied the connection between structure and magnetism of Fe/Cr superlattices as a function of sputtering pressure. To measure the perpendicular giant magnetoresistance, we have fabricated microstructured Fe/Cr pillars embedded in SiO2 and interconnected with Nb electrodes. Because of the uniform current distribution in the Nb electrodes and the minimization of the superlattice-electrod...
Chemical substitutions at very low level have been proved to be a very effective tool to change important physical parameters in many kinds of materials. These modifications may be the result of, for instance, subtle variations of the position of the Fermi level with respect to the density of states, presence of additional electrons which may change the hole carrier concentration, steric effect...
Giant magnetoresistive (GMR) nanosensors provide a novel approach for measuring protein concentrations in blood for medical diagnosis. Using an in vivo mouse radiation model, we developed protocols for measuring Flt3 ligand (Flt3lg) and serum amyloid A1 (Saa1) in small amounts of blood collected during the first week after X-ray exposures of sham, 0.1, 1, 2, 3, or 6 Gy. Flt3lg concentrations sh...
A new concept of a high-frequency amplitude detector and demodulator for Giant-Magneto-Impedance (GMI) sensors is presented. This concept combines a half wave rectifier, with outstanding capabilities and high speed, and a feedback approach that ensures the amplitude detection with easily adjustable gain. The developed detector is capable of measuring high-frequency and very low amplitude signal...
The giant piezoresistance (PZR) previously reported in silicon nanowires is experimentally investigated in a large number of depleted silicon nano- and microstructures. The resistance is shown to vary strongly with time due to electron and hole trapping at the sample surfaces independent of the applied stress. Importantly, this time-varying resistance manifests itself as an apparent giant PZR i...
The conductivity asymmetry of junctions with insulating MgO barriers embedded between ferromagnetic Fe electrodes has been investigated by the first principles calculation program of Atomistix ToolKit 2008. The conductivity in up-spin electron is larger than that in down-spin electron for the ideal structure. It leads to the large TMR ratio. The defect of O or Fe atoms hardly varies the conduct...
Abstract Stress/force monitoring of prestressing tendons is challenging but crucial to the evaluation safety structures in which they are used. To this end, a smart elasto-magneto-electric (EME) sensor based on elasto-magnetic (EM) and magneto-electric (ME) effects proposed for noncontact field absolute stress these steel tendons. In paper, our research design, implementation, application EME s...
We report an observation of a giant magneto-optical (MO) effect quadratic in magnetization (Cotton-Mouton effect) 50 nm thick layer yttrium-iron garnet (YIG). By combined theoretical and experimental approach, we managed to quantify both linear MO effects the studied material. show that signal thin YIG film can exceed response, reaching values 450 \ensuremath{\mu}rad are comparable with Heusler...
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