What is the term used to describe the B value when H field strength has returned to zero?

The term used to describe the B value when the H field strength has returned to zero is referred to as residual magnetism. This occurs when magnetization is retained in a ferromagnetic material even after the external magnetic field has been removed. Essentially, residual magnetism represents the magnetic field strength that remains in the material due to the alignment of magnetic domains that have not completely reverted back to their original state.

When an external magnetic field (H) is applied, it can cause the magnetic domains within a ferromagnetic material to align in the direction of the field, leading to an increase in the magnetic flux density (B). However, when the H field is removed, some of these domains may remain aligned, resulting in a non-zero residual B value. This concept is crucial in understanding magnetic materials and their behavior in applications such as transformers and magnetic storage.

The other terms, while related to magnetic properties, do not specifically denote the B value when H is zero. Coercive force refers to the required reverse magnetic field to reduce the B value to zero, saturation value indicates the maximum magnetization of a material, and hysteresis loss pertains to the energy lost during the magnetization and demagnetization cycle, rather than a specific measurement of B at