Boise State University
A magnetoplastic and/or magnetoelastic material transduces linear motion, delivered to it by a mechanical counection, into a change of magnetic field, via twin boundary deformation. A bias magnetic field assures a net change of magnetization during the deformation, and a coil, coaxial with the magnetoplastic/ elastic material, couples the magnetic field change to an electrical output. The bias magnetic field or a device that produces strain in a reverse direction resets the magnetomechanical transducer to its initial state. Microgenerators using the magnetoplastic/elastic material may be connected in series or parallel, combined with solar cells, and used to capture energy from passive motion such as random, cyclic or vibrational motion.
Hampikian, Greg and Müllner, Peter, "Device with Magnetoplastic and/or Magnetoelastic Thin-Film Transducer and Pick-Up Coil for Harvesting Energy" (2011). Boise State Patents. 1.