A family of hysteresis loops for grain-oriented electrical steel (BR denotes remanence and HC is the coercivity.
Remanence is the magnetization left behind in a medium after an external magnetic field is removed. It is denoted in equations as Mr. In engineering applications it is often assumed that the magnetizationM is synonymous with the residual flux densityB, hence the remanence is denoted as BR (see the image).
The remanence magnitude can be taken from a hysteresis loop at the intersections of the loop with the vertical magnetization axis. It can be measured with a B-H Analyzer.
The value of remanence is one of the most important parameters characterising permanent magnets. Neodymium magnets, for example, have a remanence approximately equal to 1.3 teslas.
