Method for measuring coercivity in magnetic materials

The coercivity of materials that are capable of supporting single wall magnetic domains are measured by an expedient and accurate technique. This technique requires that the material be placed in a static magnetic field having a gradual spatial gradient. Finger shaped domains produced in the materia...

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Bibliographic Details
Main Authors VELLA-COLEIRO; GEORGE P, WOLFE; RAYMOND
Format Patent
LanguageEnglish
Published 03.08.1982
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The coercivity of materials that are capable of supporting single wall magnetic domains are measured by an expedient and accurate technique. This technique requires that the material be placed in a static magnetic field having a gradual spatial gradient. Finger shaped domains produced in the material are then modulated by introduction of an AC magnetic field. Coercivity is obtained by measuring the distance the finger domains move due to the AC field.
Bibliography:Application Number: US19800142013