permanent magnet
Always-on field source
A permanent magnet is a material that retains its magnetic properties without requiring an external power source.
Unlike electromagnets, which need electric current to generate a magnetic field, permanent magnets maintain their magnetism indefinitely: refrigerator magnets, compass needles, the magnets in headphones.
Common materials include iron, cobalt, nickel, and rare-earth elements like neodymium.
Rare-earth metallic element
- alnicoMagnetic metallic composite
- ferriteMagnetic ceramic compound
- magnetiteMagnetic iron ore
- rare earthMetallic elements, often mined together
Strong atomic magnetic alignment
- fluxContinuous change or flow
- remanenceResidual magnetization after demagnetizing
- hysteresisHistory-dependent system response
- saturationState of complete permeation
dipole · anisotropy · magnetization · electron spin · permeability · reluctance · demagnetization · gauss
Magnetic iron ore
- iron oreExtractable metallic mineral deposit
- mineralNaturally formed crystalline solid
- compassDevice showing cardinal directions
- navigationDetermining position and course
ancient · Vikings · Gilbert · polarity · attraction
Curved metal hoof protector
Converts current to motion
- generatorElectricity-producing machine
- loudspeakerSound amplification device
- hard driveComputer's internal storage device
- MRIMagnetic body imaging
actuator · sensor · pickup · alternator · servo motor · wind turbine
neodymium
Rare-earth metallic element
rare earth · isotropic · anisotropic · grade
ferromagnetism
Strong atomic magnetic alignment
- fluxContinuous change or flow
- remanenceResidual magnetization after demagnetizing
- hysteresisHistory-dependent system response
saturation · dipole · anisotropy · magnetization · electron spin · permeability · reluctance · demagnetization · gauss · tesla
magnetite
Magnetic iron ore
- iron oreExtractable metallic mineral deposit
- mineralNaturally formed crystalline solid
- compassDevice showing cardinal directions
navigation · ancient · Vikings · Gilbert · polarity · attraction
horseshoe
Curved metal hoof protector
electric motor
Converts current to motion
- generatorElectricity-producing machine
- loudspeakerSound amplification device
- hard driveComputer's internal storage device
MRI · actuator · sensor · pickup · alternator · servo motor · wind turbine
- magnetselectromagnet, lodestones, lodestone, magnetite, ferromagnet
- magnetismferromagnetism, electromagnet, magnetization, demagnetize, poles
- magnetic circuitsair gap, reluctance, yoke, iron core, core
- Maglevmaglev, maglev train, EMS, guideway, linear motor
- rare earthscerium, lanthanides, dysprosium, erbium, europium
permanent magnetdiamagnetic
Repelled by magnetic fields
antimagnetic · superconductor · bismuth · copper · wood
magnet, permanent, magnetic, permanently, magnetism, magnets, impermanent, permanence, magnetize