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  2. Magnetic separation - Wikipedia

    en.wikipedia.org/wiki/Magnetic_separation

    Magnetic separation is the process of separating components of mixtures by using a magnet to attract magnetic substances. [1] The process that is used for magnetic ...

  3. Lead magnesium niobate - Wikipedia

    en.wikipedia.org/wiki/Lead_magnesium_niobate

    Lead magnesium niobate is a relaxor ferroelectric. [1] [2] [3] It has been used to make piezoelectric microcantilever sensors. [4] References

  4. Permeability (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Permeability...

    Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability greater than one (or, equivalently, a positive magnetic susceptibility). The magnetic moment induced by the applied field is linear in the field strength, and it is rather weak. It typically requires a sensitive analytical balance to detect the ...

  5. Magnetization - Wikipedia

    en.wikipedia.org/wiki/Magnetization

    The magnetization field or M-field can be defined according to the following equation: =. Where is the elementary magnetic moment and is the volume element; in other words, the M-field is the distribution of magnetic moments in the region or manifold concerned.

  6. Magnetic field - Wikipedia

    en.wikipedia.org/wiki/Magnetic_field

    where H 0 is the applied magnetic field due only to the free currents and H d is the demagnetizing field due only to the bound currents. The magnetic H-field, therefore, re-factors the bound current in terms of "magnetic charges". The H field lines loop only around "free current" and, unlike the magnetic B field, begins and ends near magnetic ...

  7. Magnet - Wikipedia

    en.wikipedia.org/wiki/Magnet

    Magnets are also used in other types of fastening devices, such as the magnetic base, the magnetic clamp and the refrigerator magnet. Compasses: A compass (or mariner's compass) is a magnetized pointer free to align itself with a magnetic field, most commonly Earth's magnetic field.

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  9. Lodestone - Wikipedia

    en.wikipedia.org/wiki/Lodestone

    The Earth's magnetic field at 0.5 gauss is too weak to magnetize a lodestone by itself. [9] [10] The leading theory is that lodestones are magnetized by the strong magnetic fields surrounding lightning bolts. [9] [10] [11] This is supported by the observation that they are mostly found near the surface of the Earth, rather than buried at great ...