In this article,a survey of the applications for giant-magnetoresistance(GMR) and tunneling magnetoresistance(TMR) as well as spin transfer is presented with the emphasis on the operative physical properties of the spintronic devices,including magnetic field sensors,galvanic isolators,read heads,random access memories,spin transfer switches and spin torque nano-oscillators.

We show that measuring the polarization of hyperon in the lepton induced reactions is an ideal way to study the spin transfer in high energy hadronization processes.

Recently,there has been great interest in spin angular momentum transfer effect which may bring a new generation of current-driven memory or logic devices,for example spin angular momentum transfer based magnetic random access memory,magnetic race track memory,current-driven microwave oscillator and so on.