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The magnetisation and demagnetisation (where not demagnetised thermally) occur through intermediate states [2] as shown (right). The magnetising and demagnetising wavelengths provide the energy for the system to reach the intermediate states which then relaxed non-radiatively to one of the two states (the intermediate state for magnetisation and demagnetisation are different and so the photon ...
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Ancient people learned about magnetism from lodestones (or magnetite) which are naturally magnetized pieces of iron ore.The word magnet was adopted in Middle English from Latin magnetum "lodestone", ultimately from Greek μαγνῆτις [λίθος] (magnētis [lithos]) [1] meaning "[stone] from Magnesia", [2] a place in Anatolia where lodestones were found (today Manisa in modern-day Turkey).
For this reason, the most common magnet size is a 3×1mm neodymium disk magnet. Usually the magnets used are of the highest strength available, as a stronger magnet leads to higher magnetic field sensitivity. Perhaps the most important consideration is a coating for the magnet, as typical neodymium disk magnets are not suitable for implantation.
The Source Filename field has a browse button that lets you choose a file on your computer. The Destination Filename field will contain the filename that links to your image from a Wikipedia article. See Wikipedia:Image file names for guidance on choosing a good name. If the destination field is left blank, the Source Filename will be used.
A plastic magnet is a non-metallic magnet made from an organic polymer. Plastic magnets could be used in computer hardware such as disc drives , as well as in medical devices such as pacemakers and cochlear implants , where the organic material is more likely to be biocompatible than its metallic counterparts.
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