What is meant by Reversible Temperature Coefficient of Induction (or of Coercivity)?
Two very important magnetic characteristics change (increase or decrease) with temperature: these are the induction (Br) and the coercivity (Hci) of the permanent magnet material. The word “reversible” is used to indicate that, even though the properties change as temperature is raised or lowered, that when the magnet is again brought to room temperature, the magnetic property returns to its original value. Since the amount of change per degree change in temperature is not the same at, for example, 100C and at -20C, it is necessary to specify the range of temperature over which the average is calculated. The Reversible Temperature Coefficient of Induction is often called (Greek letter) “alpha”. The Reversible Temperature Coefficient of Coercivity is often called (Greek letter) “beta”.
