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.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130322885
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- Sprache Englisch
- Genre Physik & Astronomie
- Größe H5mm x B220mm x T150mm
- Jahr 2009
- EAN 9786130322885
- Format Kartonierter Einband
- ISBN 978-613-0-32288-5
- Titel Paramagnetism
- Untertitel Magnetism, Magnetic Field, Permeability Electromagnetism, Magnetic Moment, Magnetic Susceptibility, Magnetometer, Ferromagnetism, Kinetic Theory, Antiferromagnetism
- Gewicht 139g
- Herausgeber Betascript Publishers
- Anzahl Seiten 92
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