Projects per year
Abstract
The realization of quantitative, noninvasive sensors for ambient magnetic imaging with high spatial and magnetic field resolution remains a major challenge. To address this, we have developed a relatively simple process to fabricate semi-encapsulated graphene/hBN Hall sensors assembled by dry transfer onto pre-patterned gold contacts. 1 μm-sized Hall cross sensors at a drive current of 0.5 μA exhibit excellent room temperature sensitivity, SI ∼700 V/AT, and good minimum detectable fields, Bmin = 0.54 G/Hz0.5 at a measurement frequency of 1 kHz, with considerable scope for further optimization of these parameters. We illustrate their application in an imaging study of labyrinth magnetic domains in a ferrimagnetic yttrium iron garnet film.
Original language | English |
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Article number | 043502 |
Journal | Applied Physics Letters |
Volume | 121 |
Issue number | 4 |
Early online date | 26 Jul 2022 |
DOIs | |
Publication status | Published - 31 Jul 2022 |
Bibliographical note
Funding Information:P.L., D.C., and S.J.B. acknowledge financial support from EPSRC (Engineering and Physical Sciences Research Consul) in the UK under Grant No. EP/R007160/1 and the Nanocohybri COST Action No. CA-16218. D.C. was also supported by a Ph.D. studentship from Lloyds Register Foundation ICON (Award No. G0086). Z.J.L. and S.D. acknowledge support from the Royal Society under University Research Fellowship No. UF160272. P.S. acknowledges the support of the Henry Royce Institute under Grant No. EP/R00661X/1. We also acknowledge access to the University of Bath Nanofabrication Facility where device fabrication has been performed as well as training and process support from Dr. Stephen Wedge and Dr. Siva Sivaraya. In addition, we acknowledge access to the Material and Chemical Characterisation Facility (MC2) at the University of Bath (doi.org/ 10.15125/mx6j-3r54) where Raman spectroscopy was performed.
Funding
P.L., D.C., and S.J.B. acknowledge financial support from EPSRC (Engineering and Physical Sciences Research Consul) in the UK under Grant No. EP/R007160/1 and the Nanocohybri COST Action No. CA-16218. D.C. was also supported by a Ph.D. studentship from Lloyds Register Foundation ICON (Award No. G0086). Z.J.L. and S.D. acknowledge support from the Royal Society under University Research Fellowship No. UF160272. P.S. acknowledges the support of the Henry Royce Institute under Grant No. EP/R00661X/1. We also acknowledge access to the University of Bath Nanofabrication Facility where device fabrication has been performed as well as training and process support from Dr. Stephen Wedge and Dr. Siva Sivaraya. In addition, we acknowledge access to the Material and Chemical Characterisation Facility (MC2) at the University of Bath (doi.org/ 10.15125/mx6j-3r54) where Raman spectroscopy was performed.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Magnetic Metasurfaces for Sustainable Information and Communication
Bending, S. (PI)
Engineering and Physical Sciences Research Council
1/03/22 → 31/08/25
Project: Research council
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Graphene Nanosensors for Scanning Hall Microscopy and Susceptometry
Bending, S. (PI), Wolverson, D. (CoI), Yuan, W. (CoI) & Li, P. (Researcher)
Engineering and Physical Sciences Research Council
1/01/18 → 30/06/21
Project: Research council
Datasets
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Dataset for "High resolution magnetic microscopy based on semi-encapsulated graphene Hall sensors"
Li, P. (Creator), Collomb, D. (Creator), Lim, Z. J. (Creator), Dale, S. (Creator), Shepley, P. (Creator), Burnell, G. (Creator) & Bending, S. (Creator), University of Bath, 26 Jul 2022
DOI: 10.15125/BATH-01169
Dataset