Stray-field imaging of magnetic vortices with a single diamond spin

L. Rondin, J. -P. Tetienne, S. Rohart, A. Thiaville, T. Hingant, P. Spinicelli, J. -F. Roch and V. Jacques ()
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L. Rondin: Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537
J. -P. Tetienne: Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537
S. Rohart: Laboratoire de Physique des Solides, Université Paris-Sud, CNRS UMR 8502
A. Thiaville: Laboratoire de Physique des Solides, Université Paris-Sud, CNRS UMR 8502
T. Hingant: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan
P. Spinicelli: Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537
J. -F. Roch: Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan
V. Jacques: Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537

Nature Communications, 2013, vol. 4, issue 1, 1-5

Abstract: Abstract Despite decades of advances in magnetic imaging, obtaining direct, quantitative information with nanometre scale spatial resolution remains an outstanding challenge. Recently, a technique has emerged that employs a single nitrogen-vacancy defect in diamond as an atomic-size magnetometer, which promises significant advances. However, the effectiveness of the technique when applied to magnetic nanostructures remains to be demonstrated. Here we use a scanning nitrogen-vacancy magnetometer to image a magnetic vortex, which is one of the most iconic objects of nanomagnetism, owing to the small size (~10 nm) of the vortex core. We report three-dimensional, vectorial and quantitative measurements of the stray magnetic field emitted by a vortex in a ferromagnetic square dot, including the detection of the vortex core. We find excellent agreement with micromagnetic simulations, both for regular vortex structures and for higher-order magnetization states. These experiments establish scanning nitrogen-vacancy magnetometry as a practical and unique tool for fundamental studies in nanomagnetism.

Date: 2013
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DOI: 10.1038/ncomms3279

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