Wideband High-Resolution Frequency-to-Resistance Converter Based on Nonhomogeneous Magnetic-State Transitions

Alex S. Jenkins, Lara San Emeterio Alvarez, Roberta Dutra, Ruben L. Sommer, Paulo P. Freitas, and Ricardo Ferreira
Phys. Rev. Applied 13, 014046 – Published 24 January 2020

Abstract

By harnessing the rich dynamics associated with nonhomogeneous magnetization configurations in confined nanostructures, the free layer of a magnetic tunnel junction (MTJ) can be forced, via a localized magnetic field, to transition between two magnetic states: the quasi-uniform and vortex states. Here, we demonstrate that such transitions can be driven back and forth to a dynamic equilibrium by exciting a MTJ with ac magnetic fields close to the resonant modes of the magnetic vortex. The frequency dependence of the dynamic-state transitions leads to a proposal for an alternative type of broadband analogue frequency-to-resistance converter (FRC). In this report, two quasilinear bands of the FRC are demonstrated: a relatively lower frequency converter operating between 200 and 350 MHz with 250-kHz resolution (∼500 channels) and a higher frequency converter operating between 2.5 and 6 GHz with a 2.5-MHz resolution (∼800 channels). The fact that a single CMOS-compatible nanoscale device can perform such a complex function over a multitude of frequency bands, with high-frequency resolution relative to that of conventional CMOS circuits, can enable the next generation of wireless communication circuit topologies.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 1 October 2019
  • Revised 21 November 2019

DOI:https://doi.org/10.1103/PhysRevApplied.13.014046

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Alex S. Jenkins1,*, Lara San Emeterio Alvarez1, Roberta Dutra2, Ruben L. Sommer2, Paulo P. Freitas1, and Ricardo Ferreira1

  • 1International Iberian Nanotechnology Laboratory, INL, Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal
  • 2Centro Brasileiro de Pesquisas Físicas (CBPF), Rua Dr. Xavier Sigaud 150, Rio de Janeiro 22290-180, Brazil

  • *alex.jenkins@inl.int

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 13, Iss. 1 — January 2020

Subject Areas
Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Applied

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×