Description

Recently, with the discovery of multiferroic materials, there has been a great interest in creating logic devices which exploit both magnetic and electric properties of these materials. It has been shown that the strength of the magnetic and electrical interaction in multiferroic materials could be increased greatly through indirect stress-induced magnetoelectric coupling.  Using this process, experiments have demonstrated that magnetic properties of CoFe2­­O4 (CFO)—BiFeO3 (BFO) nanostructures can be altered by using electrical fields. This electrically assisted magnetic switching (EAMS) forms the basis of our reconfigurable array of magnetic automata (RAMA).

This project proposes an array structure of magnetic quantum cellular automata (MQCA) made of multiferroic nanopillars which can be operated using electric fields. Furthermore, due to the switching nature of these nanopillars, the array can be reconfigured to implement multiple logic circuits in a similar fashion to FPGAs.

The structural layout of RAMA. The magnetic layer consists of ferromagnetic cobalt ferrite nanopillars (red) embedded in a ferroelectric bismuth ferrite matrix (blue). The magnetic layer is encased in a crossbar structure of wires which are used to select individual nanopillars.
The Structural Layout of RAMA. The magnetic layer consists of ferromagnetic cobalt ferrite nanopillars (red) embedded in a ferroelectric bismuth ferrite matrix (blue). The magnetic layer is encased in a crossbar structure of wires which are used to select individual nanopillars.