Studies of Spin Amplifier for Logic Applications
Abstract
A ferromagnet/semiconductor based electrically controlled spin-current amplifier using a dual-drain non-local lateral spin valve was demonstrated. The spin polarization injected by the source into the channel was amplified at the second drain contact. An amplified current spin polarization of 100% was measured. The device provided controlled spin-current gain, which was varied in the entire range from -1 to +1. The controlled variation of amplifier gain with bias was also demonstrated. The maximum operating temperature of the device was as high as 150 K. A pure spin-current generation with zero charge current was also demonstrated using this device. This was the first experimental demonstration of a spin-current amplifier. The observations were explained in the framework of the spin drift-diffusion model. The principle of operation of the device was very generic and could be adapted to any ferromagnet/semiconductor heterostructure system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2007
- Accession Number
- ADA474481
Entities
People
- Pallab K. Bhattacharya
Organizations
- University of Michigan