Printed Magnetoresistive Sensors for Recyclable Magnetoelectronics

Abstract

We have developed recyclable printed magnetoresistive sensors using giant magnetoresistive (GMR) microflakes and anisotropic magnetoresistive (AMR) microparticles as functional fillers, with polyepichlorohydrin (PECH) as the elastomer binder. Under their respective saturation magnetic fields of 100 mT and 30 mT, these sensors respectively exhibit magnetoresistance values of 4.7% and 0.45%. The excellent mechanical properties and thermal stability of the PECH elastomer binder endow these sensors with outstanding flexibility and temperature stability. This flexibility, low cost, and scalability make these sensors highly suitable for integration into flexible electronic devices, such as smart security systems and home automation. Moreover, these sensors are fully recyclable and reusable, allowing the materials to be separated, reused, and remanufactured without loss of performance. The low energy consumption of the production process and the recyclability of the materials significantly reduce the environmental impact of these magnetic field sensors