Nanowire Magnetic Force Sensors Fabricated by Focused-Electron-Beam-Induced Deposition

H. Mattiat, N. Rossi, B. Gross, J. Pablo-Navarro, C. Magén, R. Badea, J. Berezovsky, J. M. De Teresa, and M. Poggio
Phys. Rev. Applied 13, 044043 – Published 16 April 2020

Abstract

We demonstrate the use of individual magnetic nanowires (NWs), grown by focused-electron-beam-induced deposition (FEBID), as scanning magnetic force sensors. Measurements of their mechanical susceptibility, thermal motion, and magnetic response show that these NWs possess high-quality flexural mechanical modes and a strong remanent magnetization pointing along their long axis. Together, these properties make the NWs excellent sensors of weak magnetic field patterns, as confirmed by calibration measurements on a micron-sized current-carrying wire and magnetic scanning-probe images of a permalloy disk. The flexibility of FEBID in terms of the composition, geometry, and growth location of the resulting NWs, makes it ideal for fabricating scanning probes specifically designed for imaging subtle patterns of magnetization or current density.

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  • Received 1 November 2019
  • Revised 22 January 2020
  • Accepted 18 March 2020

DOI:https://doi.org/10.1103/PhysRevApplied.13.044043

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

H. Mattiat1,2, N. Rossi1,2, B. Gross1,2, J. Pablo-Navarro3,4, C. Magén3,4, R. Badea5, J. Berezovsky5, J. M. De Teresa3,4, and M. Poggio1,2,*

  • 1Department of Physics, University of Basel, 4056 Basel, Switzerland
  • 2Swiss Nanoscience Institute, University of Basel, 4056 Basel, Switzerland
  • 3Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
  • 4Instituto de Ciencia de Materiales de Aragón and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
  • 5Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA

  • *martino.poggio@unibas.ch

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Vol. 13, Iss. 4 — April 2020

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