Detection coil systems for vibrating sample magnetometers

Abstract

The design of detection coil systems for use in vibrating sample magnetometers is discussed with particular reference to those magnetometers which are mounted on conventional iron cored magnets. Experimental results are presented for two distinct types of coil arrangements which can be fitted into a 2 in (5.1 cm) air gap. It is found that one of these coil arrangements possesses an extremely broad saddle point. For example, the equilibrium position of the vibrating sample can be displaced by +or-2.6 mm, +or-6.4 mm or 4.8 mm in the x, y or z directions without causing a change of more than 1% in the output voltage from the detection coils.