Editing Magnet (section)

== Magnetizing ferromagnets ==
{{See also|Remanence}}

[[Ferromagnetic]] materials can be magnetized in the following ways:
* Heating the object higher than its [[Curie temperature]], allowing it to cool in a magnetic field and hammering it as it cools. This is the most effective method and is similar to the industrial processes used to create permanent magnets.
* Placing the item in an external magnetic field will result in the item retaining some of the magnetism on removal. [[Oscillation|Vibration]] has been shown to increase the effect. Ferrous materials aligned with the Earth's magnetic field that are subject to vibration (e.g., frame of a conveyor) have been shown to acquire significant residual magnetism. Likewise, striking a steel nail held by fingers in a N-S direction with a hammer will temporarily magnetize the nail.
* Stroking: An existing magnet is moved from one end of the item to the other repeatedly in the same direction (''single touch'' method) or two magnets are moved outwards from the center of a third (''double touch'' method).<ref>{{cite book |last1=McKenzie |first1=A. E. E. |title=Magnetism and electricity |date=1961 |publisher=Cambridge |pages=3–4}}</ref>
* Electric Current: The magnetic field produced by passing an electric current through a coil can get domains to line up. Once all of the domains are lined up, increasing the current will not increase the magnetization.<ref name=phares>{{cite web|title=Ferromagnetic Materials|url=http://phareselectronics.com/ferromagnetic-materials/|website=Phares Electronics|access-date=26 June 2015|url-status=dead|archive-url=https://web.archive.org/web/20150627075722/http://phareselectronics.com/ferromagnetic-materials/|archive-date=27 June 2015}}</ref>