Enhanced magnetoresistance in lateral spin-valves

Adari, R.; Patil, T.; Murthy, M.; Maheshwari, R.; Vaidya, G.; Ganguly, S.; Saha, D.
September 2010
Applied Physics Letters;9/13/2010, Vol. 97 Issue 11, p112505
Academic Journal
The effect of feature sizes on the characteristics of lateral spintronic devices have been investigated experimentally and theoretically. It is demonstrated that confining spin-transport in the active region of a device enhances magnitude of the spin-dependent response substantially. Numerical simulation of spin-transport corroborates the experimental observations. Device characteristics are found to be a strong function of spin-polarizer and analyzer dimensions. The response is observed to attain a peak value for an optimum device feature size, and this is seen to be a function of temperature. Spin dependent effects become weaker for very small and very large devices.


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