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Showing 1 to 20 of 243 for “"Ferrite"”.
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Magnetodynamic Dipolar Ferrite Modes
Made available in DSpace on 2014-12-04T21:03:14Z (GMT). No. of bitstreams: 1 6001693.pdf: 2285935 bytes, checksum: e95434be6a856b912e40567fd2a554eb (MD5) Previous issue date: 1960
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Nickel ferrite (NiFe204) thin films.
Massachusetts Institute of Technology. Dept. of Metallurgy. Thesis. 1966. Sc.D.
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Characterization of MnZn ferrite materials and finite element method for MnZn ferrite core loss calculations
… the method of calculating the core loss in ferrite cores by using a linear and sinusoidal finite element solver based on the material property data (the complex permeability, the dielectric constant, and the AC conductivity) measured in the laboratory. Due to the lack of published material …
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Implantable ferrite antenna for biomedical applications
… MHz -10 dB bandwidth. The simulated effects of ferrite film loading on antenna performance are investigated, with comparisons made for 5 and 10 µm thick films, as well as for 10 µm thick films with varying magnetic loss (tan δµ = 0.05, 0.1 and 0.3). Our simulations reveal that the addition of 10 …
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Grain boundary modifications of manganese ferrite
Complex impedance spectroscopy of Mn ferrite with $\le$1.0 wt% SiO$\sb2$ and CaCO$\sb3$ additions, cooled in air, showed two distinct arcs which were attributed to bulk and grain boundary phenomena. The bulk component was invariant while the grain boundary component varied by less than two orders …
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Magneto-Optical Study of Cobalt Ferrite Nanoparticles
… is presented, with cobalt molar ratio 0.x.1. The ferrite nanoparticles were produced using a generic wet-chemical synthesis procedure. Stoichiometric amounts of Fe2+, Fe3+ and Co2+ salts are dissolved in a non-aqueous polar medium (diethylene glycol). A coprecipitation reaction with sodium …
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Ferrite characterization techniques & particle simulations for semiconductor devices
… major topics. The first topic, techniques for ferrite characterization, is discussed over the course of two papers. The second topic, particle simulations for semiconductor devices, is discussed in the last paper. In the first paper, the method for extracting permeability from ferrite materials …
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High-performance ferrite nanoparticles for magnetothermal neural excitation
… can qualitatively predict loss power trends for ferrite nanoparticles of variable size and chemical composition in the presence of clinically relevant field frequencies and amplitudes. We then identify synthesis strategies to produce highly-crystalline magnetic nanoparticles with enhanced …
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Optimizing hysteretic power loss of magnetic ferrite nanoparticles
… to correlate hysteretic power loss of tertiary ferrite nanoparticles in alternating magnetic fields to trends predicted by physical models. By employing integration of hysteresis loops simulated from physical models for single-domain ferromagnets, we have identified ferrite materials optimal for …
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Investigation of Spinel Ferrite Thin Films for Spintronics Applications
Spinel ferrite thin films have garnered special attention due to their usefulness in recent technological advances. They hold a significant promise for various device applications, including microwave devices, memory chips, transformer cores, antenna rods, and millimeter-wave integrated circuitry. …
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Radio frequency miniature passive devices: ferrite antennas and inductors
… wave propagation, and RF signal processing. Ferrites possess both frequency-dependent permeability and permittivity. Thus, miniaturization and electromagnetic scaling of antennas and inductors can be realized with the magnetic and dielectric properties of ferrites. In addition, the unique …
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Phase formation and structural transformation of strontium ferrite SrFeOx
Non-stoichiometric strontium iron oxide is described by an abbreviated formula SrFeOx (2.5 ≤ x ≤ 3.0) exhibits a variety of interesting physical and chemical properties over a broad range of temperatures and in different gaseous environments. The oxide contains a mixture of iron in the trivalent …
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Phase formation and structural transformation of strontium ferrite SrFeOx
Non-stoichiometric strontium iron oxide is described by an abbreviated formula SrFeOx (2.5 ≤ x ≤ 3.0) exhibits a variety of interesting physical and chemical properties over a broad range of temperatures and in different gaseous environments. The oxide contains a mixture of iron in the trivalent …
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Model of a Partial Switching Effect in Ferrite Cores
Made available in DSpace on 2014-12-04T21:03:26Z (GMT). No. of bitstreams: 1 6200666.pdf: 3237814 bytes, checksum: 81dd9e08ee55046f5da9709ce8bfc32d (MD5) Previous issue date: 1961
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High-Frequency Dimensional Effects in Ferrite-Core Magnetic Devices
MnZn ferrites are widely used in power electronics applications where the switching frequency is in the range of several tens of kilohertz to a megahertz. In this range of frequencies the combination of relatively high permeability and relatively low conductivity found in MnZn ferrite helps to …
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