The H field value needed to reduce the remanence of a material to zero is referred to as?

The term for the H field value that is required to reduce the remanence of a material to zero is known as the coercive force. Coercive force represents the intensity of the magnetic field that must be applied in the opposite direction to demagnetize a ferromagnetic material. It effectively measures how resistant a material is to becoming demagnetized after it has been magnetized.

When a ferromagnetic material is magnetized, it retains some magnetism even after the external magnetizing field is removed, which is referred to as remanence. To bring this remanent magnetization back to zero, an external H field is applied in the opposite direction, and the strength of this applied field is defined as the coercive force.

Understanding this concept is critical in applications such as magnetic storage or when designing materials for specific magnetic properties.