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magnetism [2020/07/17 22:10]
stan_zurek [Scales, nature and importance,]
magnetism [2020/07/25 20:57]
stan_zurek [Scales, nature and importance,]
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 | //[[user/Stan Zurek]], Magnetism, [[http://Encyclopedia-Magnetica.com|Encyclopedia-Magnetica.com]], {accessed on @YEAR@-@MONTH@-@DAY@}// | | //[[user/Stan Zurek]], Magnetism, [[http://Encyclopedia-Magnetica.com|Encyclopedia-Magnetica.com]], {accessed on @YEAR@-@MONTH@-@DAY@}// |
  
-<box 25% right #f0f0f0>+===== Definition ===== 
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 +**Magnetism** - a physical phenomenon associated with [[magnetic field]], generated by [[electric current]], motion of [[electric charge|electric charges]],  properties of elementary particles (e.g. electron [[spin]]), or combination of all of these factors. [([[http://www.britannica.com/EBchecked/topic/357334/magnetism|Magnetism, Encyclopaedia Britannica, {accessed 3 Nov 2012}]])] [([[http://books.google.com/books?isbn=9781438110134|Joe Rosen, Encyclopedia of Physics, Infobase Publishing, 2009, ISBN 9781438110134, p. 197]])] 
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 [[Horseshoe magnet]] is a popular symbol of magnetism [[Horseshoe magnet]] is a popular symbol of magnetism
 [[/file/horseshoe_magnet_magnetica.jpg|{{/horseshoe_magnet_magnetica.jpg}}]] [[/file/horseshoe_magnet_magnetica.jpg|{{/horseshoe_magnet_magnetica.jpg}}]]
 {{page>insert/by_SZ}} {{page>insert/by_SZ}}
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-**Magnetism** - a physical phenomenon associated with [[magnetic field]], generated by [[electric current]], motion of [[electric charge|electric charges]],  properties of elementary particles (e.g. electron [[spin]]), or combination of all of these factors. [([[http://www.britannica.com/EBchecked/topic/357334/magnetism|Magnetism, Encyclopaedia Britannica, {accessed 3 Nov 2012}]])] [([[http://books.google.com/books?isbn=9781438110134|Joe Rosen, Encyclopedia of Physics, Infobase Publishing, 2009, ISBN 9781438110134, p. 197]])] 
  
 The term **[[electromagnetism]]** refers to mutual relationship between [[magnetic field]] and [[electric field]], which can be mathematically described with [[Maxwell equations|Maxwell's equations]]. The term **[[electromagnetism]]** refers to mutual relationship between [[magnetic field]] and [[electric field]], which can be mathematically described with [[Maxwell equations|Maxwell's equations]].
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 //<sup>by M. Białek, Wikimedia Commons, CC-BY-SA-3.0</sup>// </box> //<sup>by M. Białek, Wikimedia Commons, CC-BY-SA-3.0</sup>// </box>
  
-The study of magnetic phenomena extends from [[subatomic particle]]s[([[http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1062609|Trower, W., Magnetic detection of magnetic monopoles, IEEE Transactions on Magnetics, Vol. 19 (5), 1983, p. 2061]])] to cosmic scales.[([[http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1065140|Drukier, A.; Freese, K.; Spergel, D., Detecting "missing mass" candidates with the superheated superconducting detector, IEEE Transactions on Magnetics, Vol. 23 (2), 1987, p. 717]])] [[Electron|Electrons]] (which are responsible for [[ferromagnetism]]) have an estimated [[electron radius|radius]][(Hans Dehmelt, A Single Atomic Particle Forever Floating at Rest in Free Space: New Value for Electron Radius, Physica Scripta, T22, s. 102–110, 1988)] at the level of 10<sup>-22</sup> m (the estimates vary several orders of magnitude, depending on the theoretical or experimental approach) and magnetic-like effects are observed also for structures as large as galaxies[([[http://www.spacetelescope.org/images/heic0817a/|http://www.spacetelescope.org / NGC 1275, {accessed 9 May 2013}]])] with dimensions 10<sup>21</sup> m. Therefore, the magnetic phenomena extend over an extremely wide range of dimensions, and affect nature in multitude ways.+The study of magnetic phenomena extends from [[subatomic particle]]s[([[http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1062609|Trower, W., Magnetic detection of magnetic monopoles, IEEE Transactions on Magnetics, Vol. 19 (5), 1983, p. 2061]])] to cosmic scales.[([[http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1065140|Drukier, A.; Freese, K.; Spergel, D., Detecting "missing mass" candidates with the superheated superconducting detector, IEEE Transactions on Magnetics, Vol. 23 (2), 1987, p. 717]])] [[Electron|Electrons]] (which are responsible for [[ferromagnetism]]) have an estimated [[electron radius|radius]][(Hans Dehmelt, A Single Atomic Particle Forever Floating at Rest in Free Space: New Value for Electron Radius, Physica Scripta, T22, s. 102–110, 1988)] at the level of 10<sup>-22</sup> m (the estimates vary several orders of magnitude, depending on the theoretical or experimental approach) and magnetic-like effects are observed also for structures as large as galaxies[([[http://www.spacetelescope.org/images/heic0817a/|http://www.spacetelescope.org / NGC 1275, {accessed 9 May 2013}]])] with dimensions 10<sup>21</sup> m. Therefore, the magnetic phenomena extend over an extremely wide range of dimensions, and affect nature in multitude ways.
  
 There are numerous types of magnetic behaviour, many of them being highly [[non-linear]]. For instance [[ferromagnetism]][([[http://books.google.com/books?isbn=0780310322|Bozorth R.M., Ferromagnetism, IEEE Press, John Wiley & Sons, New York, 2003, ISBN 0-7803-1032-2]])] continues to have a major impact on the evolution of various technologies, mainly through its involvement in energy generation and conversion. Most of the electricity generated worldwide is converted, transmitted and consumed with the use of ferromagnetic and electromagnetic phenomena.  There are numerous types of magnetic behaviour, many of them being highly [[non-linear]]. For instance [[ferromagnetism]][([[http://books.google.com/books?isbn=0780310322|Bozorth R.M., Ferromagnetism, IEEE Press, John Wiley & Sons, New York, 2003, ISBN 0-7803-1032-2]])] continues to have a major impact on the evolution of various technologies, mainly through its involvement in energy generation and conversion. Most of the electricity generated worldwide is converted, transmitted and consumed with the use of ferromagnetic and electromagnetic phenomena. 
magnetism.txt · Last modified: 2020/07/25 20:57 by stan_zurek

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