Piezomagnetic

Piezomagnetism is a physical phenomenon exhibited by certain materials where an applied mechanical stress induces a magnetic moment, or conversely, a magnetic field induces a mechanical strain. This coupling between mechanical and magnetic properties is analogous to piezoelectricity, which links mechanical stress to electric polarization and vice versa. Piezomagnetic materials are typically ferromagnetic or ferrimagnetic and possess a degree of magnetostriction, the property of changing shape in response to a magnetic field. When subjected to mechanical stress, the magnetic domains within these materials reorient, leading to a net magnetic moment. Conversely, applying a magnetic field can cause these domains to align, inducing mechanical deformation. This effect is distinct from magnetostriction, which is a unidirectional coupling where a magnetic field causes strain, whereas piezomagnetism implies a bidirectional relationship. Piezomagnetic materials have potential applications in sensors, actuators, and energy harvesting devices where mechanical and magnetic energy conversions are required. Research in this area focuses on developing novel piezomagnetic materials with enhanced coupling coefficients and exploring their integration into functional devices.