Carrier-domain magnetometers.

摘要

A carrier-domain magnetometer (20) incorporating compensation for changes in its domain rotation fre- quency/magnetic flux density characteristic due to changes in operating conditions, e.g. electric bias and/or ambient temperature conditions, and/or dueto ageing, compensation being obtained by providing means (24 to 28) for monitoring the ratio (F-Fo)/Fo where is the domain rotation frequency when both a magnetic field biassing the magnetometer onto the linear part of its frequency/flux characteristic and a magnetic field to be sensed are applied, and Fo is the domain rotation frequency when the biassing field only is applied.