Journal article

Proximity-Induced Artefacts in Magnetic Imaging with Nitrogen-Vacancy Ensembles in Diamond

Jean-Philippe Tetienne, David A Broadway, Scott E Lillie, Nikolai Dontschuk, Tokuyuki Teraji, Liam T Hall, Alastair Stacey, David A Simpson, Lloyd CL Hollenberg

SENSORS | MDPI | Published : 2018

Abstract

Magnetic imaging with ensembles of nitrogen-vacancy (NV) centres in diamond is a recently developed technique that allows for quantitative vector field mapping. Here we uncover a source of artefacts in the measured magnetic field in situations where the magnetic sample is placed in close proximity (a few tens of nm) to the NV sensing layer. Using magnetic nanoparticles as a test sample, we find that the measured field deviates significantly from the calculated field, in shape, amplitude and even in sign. By modelling the full measurement process, we show that these discrepancies are caused by the limited measurement range of NV sensors combined with the finite spatial resolution of the optic..

View full abstract

Grants

Awarded by Australian Research Council (ARC) under the Centre of Excellence scheme


Awarded by ARC Laureate Fellowship


Awarded by ARC


Awarded by Ministry of Education, Culture, Sports, Science, and Technology, Japan


Awarded by Japan Science and Technology Agency (JST) CREST, Japan


Funding Acknowledgements

This work was supported in part by the Australian Research Council (ARC) under the Centre of Excellence scheme (project No. CE110001027). L.C.L.H. acknowledges the support of an ARC Laureate Fellowship (project No. FL130100119). J.-P.T. acknowledges support from the ARC through the Discovery Early Career Researcher Award scheme (DE170100129) and the University of Melbourne through an Establishment Grant and an Early Career Researcher Grant. D.A.B. and S.E.L. are supported by an Australian Government Research Training Program Scholarship. T.T. acknowledges the support of Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology, Japan (No. 15H03980, 26220903, and 16H06326) and Japan Science and Technology Agency (JST) CREST Grant Number JPMJCR1773, Japan.