http://wiki.karljones.com/index.php?action=history&feed=atom&title=Magnetism 2026-10-23T16:03:47Z Revision history for this page on the wiki MediaWiki 1.24.2 http://wiki.karljones.com/index.php?title=Magnetism&diff=14938&oldid=prev 2016-05-09T15:14:29Z

<p>Created page with &quot;&#039;&#039;&#039;Magnetism&#039;&#039;&#039; is a class of <a href="/index.php?title=Physical_phenomena&amp;action=edit&amp;redlink=1" class="new" title="Physical phenomena (page does not exist)">physical phenomena</a> that are mediated by <a href="/index.php?title=Magnetic_fields&amp;action=edit&amp;redlink=1" class="new" title="Magnetic fields (page does not exist)">magnetic fields</a>. == Description == Electric currents and the magnetic moments of elementary par...&quot;</p> <p><b>New page</b></p><div>'''Magnetism''' is a class of [[physical phenomena]] that are mediated by [[magnetic fields]].<br /> <br /> == Description ==<br /> <br /> Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments.<br /> <br /> Every material is influenced to some extent by a magnetic field.<br /> <br /> The most familiar effect is on permanent magnets, which have persistent magnetic moments caused by ferromagnetism.<br /> <br /> The prefix ''ferro-'' refers to [[iron]], because permanent magnetism was first observed in a form of natural iron ore called magnetite, Fe3O4.<br /> <br /> Most materials do not have permanent moments. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism).<br /> <br /> Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. These include copper, aluminium, gases, and plastic. Pure oxygen exhibits magnetic properties when cooled to a liquid state.<br /> <br /> The magnetic state (or magnetic phase) of a material depends on temperature and other variables such as pressure and the applied magnetic field. A material may exhibit more than one form of magnetism as these variables change.<br /> <br /> == See also ==<br /> <br /> * [[Coercivity]]<br /> * [[Gravitomagnetism]]<br /> * [[Magnetic hysteresis]]<br /> * [[Magnetar]]<br /> * [[Magnetic bearing]]<br /> * [[Magnetic circuit]]<br /> * [[Magnetic cooling]]<br /> * [[Magnetic field viewing film]]<br /> * [[Magnetic stirrer]]<br /> * [[Magnetic structure]]<br /> * [[Magnetism and temperature]]<br /> * [[Micromagnetism]]<br /> * [[Neodymium magnet]]<br /> * [[Physics]]<br /> * [[Plastic magnet]]<br /> * [[Rare-earth magnet]]<br /> * [[Spin wave]]<br /> * [[Spontaneous magnetization]]<br /> * [[Vibrating sample magnetometer]]<br /> <br /> == External links ==<br /> <br /> * [https://en.wikipedia.org/wiki/Magnetism Magnetism] @ Wikipedia<br /> <br /> <br /> <br /> [[Category:Magnetism]]<br /> [[Category:Physics]]</div>

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