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Toward Chirality‐Encoded Domain Wall Logic
Author(s) -
Omari Khalid A.,
Broomhall Thomas J.,
Dawidek Richard W. S.,
Allwood Dan A.,
Bradley Ruth C.,
Wood Jonathan M.,
Fry Paul W.,
Rosamond Mark C.,
Linfield Edmund H.,
Im MiYoung,
Fischer Peter J.,
Hayward Tom J.
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201807282
Subject(s) - chirality (physics) , materials science , spintronics , logic gate , nanowire , magnetic domain , nand gate , domain (mathematical analysis) , magnetization , nanotechnology , topology (electrical circuits) , computer science , ferromagnetism , physics , condensed matter physics , algorithm , magnetic field , quantum mechanics , mathematics , electrical engineering , engineering , mathematical analysis , chiral symmetry breaking , nambu–jona lasinio model , quark
Nonvolatile logic networks based on spintronic and nanomagnetic technologies have the potential to create high‐speed, ultralow power computational architectures. This article explores the feasibility of “chirality‐encoded domain wall logic,” a nanomagnetic logic architecture where data are encoded by the chiral structures of mobile domain walls in networks of ferromagnetic nanowires and processed by the chiral structures' interactions with geometric features of the networks. High‐resolution magnetic imaging is used to test two critical functionalities: the inversion of domain wall chirality at tailored artificial defect sites (logical NOT gates) and the chirality‐selective output of domain walls from 2‐in‐1‐out nanowire junctions (common operation to AND/NAND/OR/NOR gates). The measurements demonstrate both operations can be performed to a good degree of fidelity even in the presence of complex magnetization dynamics that would normally be expected to destroy chirality‐encoded information. Together, these results represent a strong indication of the feasibility of devices where chiral magnetization textures are used to directly carry, rather than merely delineate, data.