Koerzitivverhalten

Koerzitivverhalten refers to the behavior of a ferromagnetic material when subjected to a changing magnetic field. Specifically, it describes the magnetic hysteresis loop of a material. When an external magnetic field is applied to a ferromagnetic substance, its magnetic domains align. As the field is increased, the material becomes magnetized. When the external field is reduced, the material does not immediately demagnetize; it retains some degree of magnetization. This retained magnetism is known as remanence. To completely demagnetize the material, an opposing magnetic field must be applied. The strength of this opposing field required to reduce the magnetization to zero is called the coercive field or coercivity. The coercive field is a crucial parameter for classifying magnetic materials. Materials with a high coercive field are called hard magnetic materials and are used in permanent magnets, as they resist demagnetization. Materials with a low coercive field are called soft magnetic materials and are easily magnetized and demagnetized, making them suitable for applications like transformers and inductors where rapid changes in magnetization are required. The specific value of koerzitivverhalten is dependent on the material's composition, crystal structure, and processing history.