Research progress on giant magnetoresistive sensors based on spin-valve structure

Giant magnetoresistive sensors are based on the giant magnetoresistive effect, thanks to the contemporary high-speed, low-cost electronic circuits, new signal processing methods and advanced manufacturing technology, so that its development is very rapid, widely used in various industries. Compared with Hall sensors, anisotropic magnetoresistive sensors and a series of sensors on the market, giant magnetoresistive sensors have obvious advantages in terms of sensitivity, size, power consumption and resolution. This paper firstly compares the giant magnetoresistive sensors with other magnetic sensors, then introduces the principle of giant magnetoresistive effect and the structure of giant magnetoresistive sensors, describes in detail the typical process of making giant magnetoresistive sensors, and finally elaborates on the development history of giant magnetoresistive sensors and looks forward to its development prospect.