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Downtown Magnets High School (DMHS) is an alternate magnet high school located in the Temple-Beaudry neighborhood near Downtown Los Angeles.The school belongs to the Downtown/MacArthur Park Community of Schools [5] and houses three magnet programs: Business (DBM), and Electronic Information (EIM), and the International Baccalaureate (IB).
Molecule-based magnets (MBMs) or molecular magnets are a class of materials capable of displaying ferromagnetism and other more complex magnetic phenomena. This class expands the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other properties such as ...
Paramagnetism, ferromagnetism, and spin waves. Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet.
As it is known today, there are only a few possible ways to reverse the magnetization of a metallic magnet: an applied magnetic field [5] spin injection via a beam of particles with spin [5] magnetization reversal by circularly polarized light; [6] i.e., incident electromagnetic radiation that is circularly polarized
Schematic of a permanent magnet motor. A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for an axial flux topology.
This does not occur when the magnet is switched on, because the limited supply voltage causes the current through the magnet and the field energy to increase slowly, but when it is switched off, the energy in the magnetic field is suddenly returned to the circuit, causing a large voltage spike and an arc across the switch contacts, which can ...
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