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      Probing magnetism in 2D materials at the nanoscale with single-spin microscopy

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          Abstract

          The discovery of ferromagnetism in 2D van der Waals (vdW) crystals has generated widespread interest. Making further progress requires quantitative knowledge of the magnetic properties of vdW magnets on the nanoscale. We use scanning single-spin magnetometry based on diamond NV centers to image the magnetization, localized defects and magnetic domains of atomically thin crystals of the vdW magnet CrI 3. We determine the magnetization of CrI 3 monolayers to be ≈16μ B/nm 2 with comparable values in samples with odd numbers of layers, whereas the magnetization vanishes when the number of layers is even. We also find that structural modifications can induce switching between ferro- and anti-ferromagnetic interlayer ordering. These results demonstrate the power of single-spin scanning magnetometry to study the magnetism of 2D vdW magnets.

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          Most cited references25

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          Scanning Confocal Optical Microscopy and Magnetic Resonance on Single Defect Centers

          A. Gruber (1997)
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            Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2

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              Strong room-temperature ferromagnetism in VSe2 monolayers on van der Waals substrates

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                Author and article information

                Journal
                Science
                Science
                American Association for the Advancement of Science (AAAS)
                0036-8075
                1095-9203
                April 25 2019
                : eaav6926
                Article
                10.1126/science.aav6926
                31023891
                3d80b968-6047-4641-8672-6957ca3ba9bf
                © 2019
                History

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