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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:2109.05101 (cond-mat)
[Submitted on 10 Sep 2021 (v1), last revised 13 Jun 2022 (this version, v3)]

Title:Anisotropic MagnetoMemristance

Authors:Francesco Caravelli, Ezio Iacocca, Gia-Wei Chern, Cristiano Nisoli, Clodoaldo I. L. de Araujo
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Abstract:In the last decade, nanoscale resistive devices with memory have been the subject of intense study because of their possible use in brain-inspired computing. However, operational endurance is one of the limiting factors in the adoption of such technology. For this reason, we discuss the emergence of current-induced memristance in magnetic materials, known for their durability. We show analytically and numerically that a single ferromagnetic layer can possess GHz memristance, due to a combination of two factors: a current-induced transfer of angular momentum (Zhang-Li torque) and the anisotropic magnetoresistance (AMR). We term the resulting effect the anisotropic magneto-memristance (AMM). We connect the AMM to the topology of the magnetization state, within a simple model of a 1-dimensional annulus-shaped magnetic layer, confirming the analytical results with micromagnetic simulations for permalloy. Our results open a new path towards the realization of single-layer magnetic memristive devices operating at GHz frequencies.
Comments: 20 pages + supplementary material; 31 pages in total; 11 figures; Introduction: this https URL
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Soft Condensed Matter (cond-mat.soft); Statistical Mechanics (cond-mat.stat-mech); Pattern Formation and Solitons (nlin.PS)
Cite as: arXiv:2109.05101 [cond-mat.mes-hall]
  (or arXiv:2109.05101v3 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.2109.05101
Journal reference: Communications Physics 5, 166 (2022)

Submission history

From: Francesco Caravelli [view email]
[v1] Fri, 10 Sep 2021 20:33:24 UTC (2,298 KB)
[v2] Tue, 14 Sep 2021 15:51:06 UTC (2,298 KB)
[v3] Mon, 13 Jun 2022 15:32:34 UTC (4,666 KB)
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