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Switching of Dipole Coupled Multiferroic Nanomagnets in the Presence of Thermal Noise: Reliability of Nanomagnetic Logic

IEEE TRANSACTIONS ON NANOTECHNOLOGY (2013)

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期刊

IEEE TRANSACTIONS ON NANOTECHNOLOGY
卷 12, 期 6, 页码 1206-1212

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2013.2284777

关键词

Landau-Lifshitz-Gilbert (LLG) equation; nanomagnetic logic (NML); reliability; straintronics-spintronics; thermal noise

类别

Engineering, Electrical & Electronic Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied

资金

  1. U.S. National Science Foundation under the SHF-Small grant [CCF-1216614]
  2. NEB grant [ECCS-1124714]
  3. Semiconductor Research Corporation under NRI [2203.001]
  4. Division of Computing and Communication Foundations
  5. Direct For Computer & Info Scie & Enginr [1216614] Funding Source: National Science Foundation
  6. Div Of Electrical, Commun & Cyber Sys
  7. Directorate For Engineering [1124714] Funding Source: National Science Foundation

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The stress-induced switching behavior of a multiferroic nanomagnet, dipole coupled to a hard nanomagnet, is numerically studied by solving the stochastic Landau-Lifshitz-Gilbert equation for a single-domain macrospin state. Different factors were found to affect the switching probability in the presence of thermal noise at room temperature: 1) dipole coupling strength, 2) stress levels, and 3) stress withdrawal rates (ramp rates). We report that the thermal broadening of the magnetization distribution causes large switching error rates. This could render nanomagnetic logic schemes that rely on dipole coupling to perform Boolean logic operations impractical whether they are clocked by stress or field or other means.

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