Nonvolatile Spin Switch Capable of Logical Operations

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Spin electronics exploit the intrinsic spin of an electron as a means of transmitting and storing information. In metal, the spin of the electrons can be polarized into a certain direction to magnetize the object, so switching between polarities can provide a means for binary-state devices. This technology has seen limited use in memory applications, such as hard drives and random access memory, but logical devices would also greatly benefit from the low-power usage and speed of spintronics.

Purdue University researchers have designed a charge-coupled spin logic (CSL) switch that is capable of logical operations. Unlike all-spin logic (ASL) devices, this switch uses electric currents to communicate spin values over longer distances more robustly. This design uses less power than conventional transistors and allows for the design of hybrid analog/digital devices, which combine conventional and spintronic components. Multiple switches can be configured to perform Boolean logic functions or to create an artificial neural network with voltage-adjustable weights.

Advantages:
-Uses less power than conventional methods
-More robust communication over longer distances

Potential Applications:
-Implementing logic circuits, Boolean and non-Boolean
Mar 2, 2015
NATL-Patent
United States
9,379,313
Jun 28, 2016

Aug 30, 2013
PCT-Patent
WO
(None)
(None)

Sep 1, 2012
Provisional-Patent
United States
(None)
(None)

Aug 19, 2012
Provisional-Patent
United States
(None)
(None)
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