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USS Jimmy Carter in the magnetic silencing facility at Naval Base Kitsap for her first deperming treatment RMS Queen Mary arriving in New York Harbor, 20 June 1945, with thousands of U.S. soldiers – note the prominent degaussing coil running around the hull Control panel of the MES-device ("Magnetischer Eigenschutz" German: magnetic self-protection) in a German submarine Close-wrap deperming ...
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Coercivity in a ferromagnetic material is the intensity of the applied magnetic field (H field) required to demagnetize that material, after the magnetization of the sample has been driven to saturation by a strong field. This demagnetizing field is applied opposite to the original saturating field.
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.
The magnetization is normally done with a high current pulse that reaches a peak current very quickly and instantaneously turns off leaving the part magnetized. To demagnetize a part, the current or magnetic field needed has to be equal to or greater than the current or magnetic field used to magnetize the part.
When you swipe or insert your credit card into a card reader, the card reader receives information like your account number and credit limit. If the magnetic strip on your card is damaged, the ...
Fig. 1 A family of AC hysteresis loops for grain-oriented electrical steel (B r denotes remanence and H c is the coercivity).. The default definition of magnetic remanence is the magnetization remaining in zero field after a large magnetic field is applied (enough to achieve saturation). [1]