Sub-nanosecond signal propagation in anisotropy-engineered nanomagnetic logic chains

Gu, Zheng; Nowakowski, Mark E.; Carlton, David B.; Storz, Ralph; Im, Mi-Young; Hong, Jeongmin; Chao, Weilun; Lambson, Brian; Bennett, Patrick; Alam, Mohmmad T.; Marcus, Matthew A.; Doran, Andrew; Young, Anthony; Scholl, Andreas; Fischer, Peter; Bokor, Jeffrey

doi:10.1038/ncomms7466

Title: Sub-nanosecond signal propagation in anisotropy-engineered nanomagnetic logic chains

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms7466· OSTI ID:1256012

Gu, Zheng ^[1]; Nowakowski, Mark E. ^[1]; Carlton, David B. ^[2]; Storz, Ralph ^[3]; Im, Mi-Young ^[4];

^[1]; Chao, Weilun ^[5]; Lambson, Brian ^[6]; Bennett, Patrick ^[1]; Alam, Mohmmad T. ^[7]; Marcus, Matthew A. ^[5]; Doran, Andrew ^[5]; Young, Anthony ^[5]; Scholl, Andreas ^[5];

^[8]; Bokor, Jeffrey ^[1]

Univ. of California, Berkeley, CA (United States)
Intel Corp., Santa Clara, CA (United States)
Thorlabs Inc., Newton, NJ (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Daegu Gyeongbuk Inst. of Science and Technology (Korea)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
iRunway, Santa Clara, CA (United States)
Intel Corp., Hillsboro, OR (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)

Energy efficient nanomagnetic logic (NML) computing architectures propagate binary information by relying on dipolar field coupling to reorient closely spaced nanoscale magnets. In the past, signal propagation in nanomagnet chains were characterized by static magnetic imaging experiments; however, the mechanisms that determine the final state and their reproducibility over millions of cycles in high-speed operation have yet to be experimentally investigated. Here we present a study of NML operation in a high-speed regime. We perform direct imaging of digital signal propagation in permalloy nanomagnet chains with varying degrees of shape-engineered biaxial anisotropy using full-field magnetic X-ray transmission microscopy and time-resolved photoemission electron microscopy after applying nanosecond magnetic field pulses. Moreover, an intrinsic switching time of 100 ps per magnet is observed. In conclusion these experiments, and accompanying macrospin and micromagnetic simulations, reveal the underlying physics of NML architectures repetitively operated on nanosecond timescales and identify relevant engineering parameters to optimize performance and reliability.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02–05CH11231

OSTI ID:: 1256012

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 21 works

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Experimental test of Landauer’s principle in single-bit operations on nanomagnetic memory bits Hong, Jeongmin; Lambson, Brian; Dhuey, Scott Science Advances, Vol. 2, Issue 3 https://doi.org/10.1126/sciadv.1501492	journal	March 2016
A magnetic shift register with out-of-plane magnetized layers Mansell, Rhodri; Beguivin, A.; Fernandez-Pacheco, Amalio Apollo - University of Cambridge Repository https://doi.org/10.17863/cam.10372	text	January 2017

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