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Paramagnetism
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Paramagnetism - Livres de poche

ISBN: 6130322887

Edition reliée, ID: 6031437

Magnetism, Magnetic Field, Permeability Electromagnetism, Magnetic Moment, Magnetic Susceptibility, Magnetometer, Ferromagnetism, Kinetic Theory, Antiferromagnetism - Buch, gebundene Ausgabe, 92 S., Beilagen: Paperback, Erschienen: 2009 Betascript Publishers High Quality Content by WIKIPEDIA articles! Paramagnetism is a form of magnetism which occurs only in the presence of an externally applied magnetic field. Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability of =1 (1 or more, a positive magnetic susceptibility). The magnetic moment induced by the applied field is linear in the field strength and rather weak. It typically requires a sensitive analytical balance to detect the effect and modern measurements on paramagnetic materials are often conducted with a SQUID magnetometer. Unlike ferromagnets, paramagnets do not retain any magnetization in the absence of an externally applied magnetic field, because thermal motion causes the spins to become randomly oriented without it. Thus the total magnetization will drop to zero when the applied field is removed. Even in the presence of the field there is only a small induced magnetization because only a small fraction of the spins will be oriented by the field. This fraction is proportional to the field strength and this explains the linear dependency.

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Paramagnetism
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High Quality Content by WIKIPEDIA articles! Paramagnetism is a form of magnetism which occurs only in the presence of an externally applied magnetic field. Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability of =1 (1 or more, a positive magnetic susceptibility). The magnetic moment induced by the applied field is linear in the field strength and rather weak. It typically requires a sensitive analytical balance to detect the effect and modern measurements on paramagnetic materials are often conducted with a SQUID magnetometer. Unlike ferromagnets, paramagnets do not retain any magnetization in the absence of an externally applied magnetic field, because thermal motion causes the spins to become randomly oriented without it. Thus the total magnetization will drop to zero when the applied field is removed. Even in the presence of the field there is only a small induced magnetization because only a small fraction of the spins will be oriented by the field. This fraction is proportional to the field strength and this explains the linear dependency.

Informations détaillées sur le livre - Paramagnetism


ISBN (ISBN-10): 6130322887
Version reliée
Livre de poche

Livre dans la base de données depuis 10.06.2007 20:00:10
Livre trouvé récemment le 17.06.2010 17:24:51
ISBN/EAN: 6130322887

ISBN - Autres types d'écriture:
613-0-32288-7


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