The principle, preparation and development of magnetoresistance/superconducting composite magnetic sensors

Abstract Weak magnetic detection plays an important role in life, demonstrating enormous potential and application value in fields such as healthcare, transportation, and military. With the increasing demand for weak magnetic field detection, a new type of magnetoresistance/superconducting composite magnetic sensor has been successfully developed in recent years. It combines superconducting magnetic concentration technology and magnetic sensing technology, and unleashes the potential of both in weak magnetic detection. In terms of magnetic field detection accuracy, it is expected to reach the fT level and has demonstrated the possibility of large-scale application in the field of weak magnetic detection. This article reviews the structure and principle of magnetoresistance/superconducting composite magnetic sensors, and introduces the preparation and development of giant magnetoresistance/superconducting composite magnetic sensors and tunneling magnetoresistance/superconducting composite magnetic sensors, respectively.