Q.Does magnetic force (Br) increase in accordance with the coefficients in the ranges of minus temperatures?
Magnets > Magnets > Ferrite Magnets/ Neodymium Magnets
The Br increases due to the temperature coefficient with ferrite if the temperature is around -40°C, but it does not necessarily increase with the Bd because of the balance with the permeance coefficient.
The Br increases due to the temperature coefficient with Neodymium magnets if the temperature is around -40°C. The Bd also increases in the same manner.