19-12-2012, 04:04 PM
SPINTRONICS
SPINTRONICS.pptx (Size: 507.26 KB / Downloads: 454)
WHAT IS SPINTRONICS ?
Spintronics is a combination of two words
(spin & electronics)
Spintronics is a blend of electronics with spin.
It refers to the study of the role played by the electron spin in solid state physics
It enhances functionality, high speed and reduced power consumption.
WHY WE NEED SPINTRONICS !!!
Failure of Moore’s Law :
Moore’s Law states that the number of transistors on a silicon chip will roughly double every eighteen months.
But now the transistors & other components have reached nanoscale dimensions and further reducing the size would lead to:
1. Scorching heat making the circuit inoperable.
2. Also Quantum effects come into play at nanoscale dimensions.
PRINCIPLE
In Spintronics , information is carried by orientation of spin rather than charge.
Spin can assume one of the two states relative to the magnetic field, called spin up or spin down.
The frequency and direction of rotation depends on the strength of magnetic field and characteristics of the material.
FABRICATION
Spintronics devices involves two different approaches for designing & manufacturing.
Giant-magneto resistance, GMR based technology
Tunnel-magneto resistance, TMR based technology