Method for Detection for Magnetic Contamination
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-29
The method described enables the detection of small magnetic particles. The necessary components for application of the method are a piece of magnetic recording medium, a magnet for magnetizing medium, an instrument for measuring the magnetic moment, and magnetic particles. The method depends upon the interaction of the magnetic fields of the particles with the magnetization of the magnetic medium. This interaction results in a decrease in magnetization of a previously magnetized magnetic medium when the particles are brought into proximity to the magnetic medium. This decrease in the magnetization of the medium is a measure of the field strength of the magnetic particles.