Magnetic Tunnel Junction Logic Architecture for Realization of Simultaneous Computation and Communication

We investigated magnetic tunnel junction (MTJ)-based circuit that allows direct communication between elements without intermediate sensing amplifiers. Two- and three-input circuits that consist of two and three MTJs connected in parallel, respectively, were fabricated and are compared. The direct communication is realized by connecting the output in series with the input and applying voltage across the series connections. The logic circuit relies on the fact that a change in resistance at the input modulates the voltage that is needed to supply the critical current for spin-transfer torque switching the output. The change in the resistance at the input resulted in a voltage swing of 50-200 mV and 250-300 mV for the closest input states for the three and two input designs, respectively. The two input logic gate realizes the AND, NAND, NOR, and OR logic functions. The three-input logic function realizes the majority, AND, NAND, NOR, and OR logic operations.

[1]  Jun Shen,et al.  Logic devices and circuits based on giant magnetoresistance , 1997 .

[2]  David J. Lilja,et al.  Direct communication between magnetic tunnel junctions for nonvolatile logic fan-out architecture , 2010 .

[3]  Berger Emission of spin waves by a magnetic multilayer traversed by a current. , 1996, Physical review. B, Condensed matter.

[4]  G. Jullien,et al.  Circuit design based on majority gates for applications with quantum-dot cellular automata , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[5]  A. Panchula,et al.  Magnetically engineered spintronic sensors and memory , 2003, Proc. IEEE.

[6]  F. Ebrahimi,et al.  Magnetic Tunnel Junction-Based Spintronic Logic Units Operated by Spin Transfer Torque , 2012, IEEE Transactions on Nanotechnology.

[7]  A. Kent,et al.  Spin-transfer-induced precessional magnetization reversal , 2004 .

[8]  J. C. Sloncxewski,et al.  Current-driven excitation of magnetic multilayers , 2003 .

[9]  Ilya Krivorotov,et al.  Deep subnanosecond spin torque switching in magnetic tunnel junctions with combined in-plane and perpendicular polarizers , 2011 .

[10]  Jian-Ping Wang,et al.  A spintronics full adder for magnetic CPU , 2005 .

[11]  Xiaofeng Yao,et al.  Programmable spintronic logic devices for reconfigurable computation and beyond - History and outlook , 2008 .

[12]  E. Belhaire,et al.  A non-volatile flip-flop in magnetic FPGA chip , 2006, International Conference on Design and Test of Integrated Systems in Nanoscale Technology, 2006. DTIS 2006..

[13]  Jianping Wang,et al.  Spintronic logic gates for spintronic data using magnetic tunnel junctions , 2010, 2010 IEEE International Conference on Computer Design.