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© Research
Publication : Nature communications

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

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 01 Jan 2013

Rondin L, Tetienne JP, Rohart S, Thiaville A, Hingant T, Spinicelli P, Roch JF, Jacques V

Link to Pubmed [PMID] – 23900221

Nat Commun 2013;4:2279

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.