Transcription of AC Measurement of Magnetic Susceptibility 11-09
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AC Measurement of Magnetic Susceptibility 11-09
1 AC Measurement of Magnetic Susceptibility Ferromagnetic materials such as iron, cobalt and nickel are made up of microscopic domains in which the magnetization of each domain has a well defined orientation. A macroscopic sample contains a large number of domains all with random orientation and consequently does not pos-sess a magnetization. Ferromagnetic samples can be magnetized by applying an external field large enough to cause a majority of the domains to align in the direction of the external field. Microscopically, an individual domain experiences a local Magnetic field from the neigh-boring domains. In order to re-orient a given domain, the Magnetic torque produced by the external field must be large enough to overcome the forces which keep the domain pinned.
AC Measurement of Magnetic Susceptibility Ferromagnetic materials such as iron, ... The simplest geometry for magnetic field measurements is the toroid (Fig.2).
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