Electronic Devices
1. Based on the properties of charge of the electron
2. Classical property
4. Materials: conductors and semiconductors
5. Based on the number of charges and their energy
6. Speed is limited, and power dissipation is high.
Spintronics devices
1. Based on intrinsic property spin of the electron.
2. Quantum property
4. Materials: ferromagnetic materials
5. Two basic spin states; spin-up and spin-down.
6. Based on the direction of spin and spin coupling, high speed.
Imagine a data storage device of the size of an atom working at the speed of light. Imagine a computer memory thousands of times denser and faster than today‘s memories and also imagine a scanner technique that can detect cancer cells even though they are less in number. The above-mentioned things can be made possible with the help of an exploding science ―Spintronics. Spintronics is a technology that deals with the spin-dependent properties of an electron instead of or in addition to its charge-dependent properties. Conventional electronics devices rely on the transport of electric charge carriers and electrons. But there are other dimensions of an electron other than its charge and mass i.e. spin. This dimension can be exploited to create a remarkable generation of spintronics devices. It is believed that in the near future spintronics could be more revolutionary than any other technology.

The basic materials used in spin devices for manipulation of spin of electrons are the ferromagnetic which have the capability to change the spin polarization on application of magnetic fields. The spin materials can be classified into two groups:
Ferromagnetic Semiconductors
Half-Magnetic ferromagnets
Ferromagnetic Semiconductors
These are the materials with complete control over the spin electron. The main advantages of these types of materials are: