Permanent magnet variable flux sources

Permanent magnet variable flux sources

Rotatable transversely-magnetized permanent magnet rods can be used to generate variable, uniform magnetic fields or field gradients. A four-rod device for use at the specimen stage of an optical microscope is described where the field can be in-plane or perpendicular to the stage. The maximum flux...

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Bibliographic Details
Published in:IEEE transactions on magnetics Vol. 30; no. 6; pp. 4602 - 4604
Main Authors: Cugat, O., Hansson, P., Coey, J.M.D.
Format: Journal Article
Language:English
Published: IEEE 01-11-1994
Subjects:
Coils
Magnetic domains
Magnetic field measurement
Magnetic fields
Magnetic flux
Magnetic materials
Magnetic moments
Magnetic separation
Optical microscopy
Permanent magnets
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Description
Summary:Rotatable transversely-magnetized permanent magnet rods can be used to generate variable, uniform magnetic fields or field gradients. A four-rod device for use at the specimen stage of an optical microscope is described where the field can be in-plane or perpendicular to the stage. The maximum flux density ranges from 36 mT (360 G) for isotropic ferrite to 210 mT (2.1 kG) For sintered Nd-Fe-B. Calculated and measured field profiles are in good agreement. Homogeneity is better than 1% of maximum in a region of diameter 7 mm or 3.5 mm at maximum and zero field, respectively.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/20.334162