Pulsed Field Magnetometers: Closing the loop on hard magnetic material characterization

The Pulsed-Field Magnetometer (PFM) is internationally recognised for the complete characterization of modern magnetic materials. It is a method for generating a hysteresis graph similar to that of a permeameter.

Hirst recently launched its 8th generation of PFM, magnet characterization magnetometers.
Uniquely these include the Hirst proprietary Self De-magnetisation Field Function SDFF™ which accurately generates an open to closed circuit mapping (O2C™). This finally gives permeameter like measurements. With a maximum field of 10.5T (8356 kA/m / 105 kOe) even the most coercive materials and highest grades of NdFeB magnets and SmCo can be measured, while traditional permeameters cannot measure these high coercivity material due to pole piece saturation limitations. The International Electrotechnical Commission (IEC) has issued IEC TR62331, a draft to define the standard methodology for the characterization of permanent magnetic materials using the PFM technique.

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