Method and system for providing spin transfer based logic devices

A logic device comprising:

• a plurality of input electrode;
• a plurality of magnetic input/channel regions corresponding to the plurality of input electrodes, each of the plurality of magnetic input/channel regions being magnetically biased in a first direction and having a cross-sectional area, one of the plurality of magnetic input/channels regions being coupled with a bias voltage;
• at least one magnetic sensor region having a sensor region cross-sectional area greater than the cross-sectional area, being magnetically biased in a second direction different from the first direction such that at least one domain wall resides in the plurality of magnetic input/channel regions if the logic device is in a quiescent state;
• and
• at least one sensor coupled with the at least one magnetic sensor region, each of the at least one sensor including a free layer and a nonmagnetic spacer layer residing between the at least one magnetic sensor region and the free layer, the at least one magnetic sensor region being a free layer for the at least one sensor;
• wherein the plurality of input/channel regions and the at least one magnetic sensor region are configured such that the at least one domain wall may move into the at least one magnetic sensor region in response to spin transfer torque due to a logic signal being provided to at least a portion of the plurality of magnetic input regions.

A method for providing a logic device comprising:

• providing a plurality of magnetic input/channel regions, each of the plurality of magnetic input/channel regions being magnetically biased in a first direction;
• providing at least one magnetic sensor region being magnetically biased in a second direction different from the first direction such that at least one domain wall resides in the plurality of magnetic input/channel regions if the logic device is in a quiescent state;
• and
• providing at least one sensor coupled with the at least one magnetic sensor region, the at least one sensor for outputting a signal based on a magnetic state of the at least one magnetic sensor region;
• wherein the plurality of input/channel regions and the at least one magnetic sensor region are configured such that the at least one domain wall may move into the at least one magnetic sensor region in response to a logic signal being provided to at least a portion of the plurality of magnetic input regions.