Method for measuring coercivity in magnetic materials

Details Method for measuring coercivity in magnetic materials Method for measuring coercivity in magnetic materials

1980-04-21

1982-08-03

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324210, G01N 2772, G01R 3312

Patent

active

043429629

ABSTRACT:
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.

REFERENCES:
Shumate, Jr., "Magnetooptic-Measurement Techniques . . ." IEEE Transactions on Magnetics, Sep. 1971, pp. 586-590.
Vella-Coleiro et al, "New Method for Routine Measurement . . ." IEEE Transactions on Magnetics, Sep. 1980, pp. 625-627.

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