Feldmaterial
Feldmaterial (field material) is a German term used primarily in physics and materials science to describe substances whose physical properties are determined by, or can be actively controlled through, external fields. In practice the term is used for materials that exhibit a notable response when subjected to electric, magnetic, acoustic, or mechanical fields, and that enable field-guided functionality in devices.
Common categories include dielectric and magnetically responsive materials, piezoelectric and ferroelectric ceramics, magnetorheological and electroactive polymers,
Applications span sensors and actuators, robust RF components, energy harvesting, and the development of metamaterials and
The term is descriptive rather than a formal discipline and its precise meaning varies with context. Some