Spintronics: Combination of Nanotechnology & Superconductivity

Abstract

Advances in fabrication & characterization of magnetic & superconductivity materials on nanometre length scales paves the way for new experimental, theoretical & technological frontiers. This paper emphasize on “spintronics”:  it is a nanoscale technology in which information is carried not by the electon’s charge, as it is in conventional microchips, but by the electron’s intrinsic spin, by controlling the spin degree of freedom in solid – state heterostructures & magnetic quantum  dots,  Spintronics  offers new possibilities for developing data processing speeds, lower electric consumption & the ability to carry out radically new quantum computations over conventional electronics.

Spintronics a prototype device that is already in use in industry as a read head & a memory –storage cell is the giant – magneto resistive (GMR) sandwich structure which consists of alternating ferromagnetic & non-magnetic metal layers. Experimental work is reviewed with the emphasis on the fundamentals & application in which external electric & magnetic field will be used to control spin & charge dynamics to create new functionalities which are ineffective with conventional electronics.

Key Words: spintronics,  superconductivity,  giant – magneto resistive (GMR),  magnetic field,  heterostructures,  conventional electronics etc.