Magnetic Susceptibility Measurement Device and Magnetic Susceptibility Measurement Method

A magnetic susceptibility measurement method for measuring magnetic susceptibility of an object to be measured containing magnetic particles, the magnetic susceptibility measurement method comprising:

• disposing the object to be measured in proximity to or in contact with a probe comprising a signal transmission line formed therein, the object to be measured being disposed in proximity to or in contact with the signal transmission line, a magnetization easy axis direction of the object to be measured being orthogonal to the signal transmission line;
• applying, by a first magnetic field applying means, a magnetic field in the magnetization easy axis direction of the object to be measured;
• applying, by a second magnetic field applying means, a magnetic field in a magnetization hard axis direction orthogonal to the magnetization easy axis direction of the object to be measured;
• measuring, by a signal measurement device, a signal transmitted through the signal transmission line in a state in which the magnetic fields are applied by both the first magnetic field applying means and the second magnetic field applying means;
• and
• obtaining, by an arithmetic processing means, magnetic susceptibility of the object to be measured based on the signal measured by the signal measurement means.

A magnetic susceptibility control method for controlling magnetic susceptibility of an object to be measured containing magnetic particles, the magnetic susceptibility control method comprising:

• magnetizing, by a first magnetic field applying means, the object to be measured in an easy axis direction of the object to be measured;
• applying, by a second magnetic field applying means, a magnetic field in a magnetization hard axis direction orthogonal to the magnetization easy axis direction of the object to be measured;
• and
• varying, by a control means, the strength of the magnetic field applied by the second magnetic field applying means to control to change the magnetic susceptibility of the object to be measured.