Magnetic Imaging with Spin Defects in Hexagonal Boron Nitride

Kumar, Pawan; Fabre, F.; Durand, A.; Clua-Provost, T.; Li, J.; Edgar, James H.; Rougemaille, Nicolas; Coraux, Johann; Marie, X.; Renucci, Pierre; Robert, Cédric; Robert-Philip, I.; Gil, Bernard; Cassabois, Guillaume; Finco, Aurore; Jacques, Vincent

doi:10.1103/physrevapplied.18.l061002

Cited by 31 publications

(27 citation statements)

References 39 publications

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“…Given the small dimension and low mass of exfoliated flakes, a sensitive probe of magnetism capable of room temperature operation is required to investigate thin CFGT flakes. Examples of such probes include magnetic force microscopy (MFM), magnetic optical Kerr effect (MOKE) microscopy, NV scanning probe microscopy, , and more recently, magnetic sensing with boron vacancy defect centers in hexagonal boron nitride. − In this work, we employed wide-field QMI with NV centers in diamond. Given its ability to detect magnetic fields with high sensitivity and high spatial resolution (diffraction-limited), the NV center in diamond realizes a powerful quantum sensor of the local magnetic field and hence provides an enabling tool for advancing condensed matter physics and materials science .…”

Section: Resultsmentioning

confidence: 99%

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂

Chen

Asif

Dolui³

et al. 2023

ACS Appl. Mater. Interfaces

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Two-dimensional (2D) magnetic van der Waals materials provide a powerful platform for studying the fundamental physics of low-dimensional magnetism, engineering novel magnetic phases, and enabling thin and highly tunable spintronic devices. To realize high-quality and practical devices for such applications, there is a critical need for robust 2D magnets with ordering temperatures above room temperature that can be created via exfoliation. Here, the study of exfoliated flakes of cobalt-substituted Fe 5 GeTe 2 (CFGT) exhibiting magnetism above room temperature is reported. Via quantum magnetic imaging with nitrogen-vacancy centers in diamond, ferromagnetism at room temperature was observed in CFGT flakes as thin as 16 nm corresponding to 16 layers. This result expands the portfolio of thin roomtemperature 2D magnet flakes exfoliated from robust single crystals that reach a thickness regime relevant to practical spintronic applications. The Curie temperature T c of CFGT ranges from 310 K in the thinnest flake studied to 328 K in the bulk. To investigate the prospect of high-temperature monolayer ferromagnetism, Monte Carlo calculations were performed, which predicted a high value of T c of ∼270 K in CFGT monolayers. Pathways toward further enhancing monolayer T c are discussed. These results support CFGT as a promising platform for realizing high-quality room-temperature 2D magnet devices.

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Section: Resultsmentioning

confidence: 99%

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂

Chen

Asif

Dolui³

et al. 2023

ACS Appl. Mater. Interfaces

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“…Specifically, this performance is sufficient for addressing quantum materials such as graphene 23,[46][47][48] and vdW magnets. [22][23][24] We then demonstrate high-resolution magnetic field imaging. We repeat similar current sweep measurements as Fig.…”

Section: So Far We Have Established That V −mentioning

confidence: 96%

“…20 They can be used as a sensor for the magnetic field, temperature, etc. [21][22][23][24] As hBN is a van der Waals (vdW) material, its nanometer-thin flakes can be peeled off with Scotch tape and tightly attached to the sensing target by a stamping technique. The flake thickness can be determined with a stylus profiler, which gives the maximum V − B -target distance.…”

Section: −mentioning

confidence: 99%

Magnetic field imaging by hBN quantum sensor nanoarray

Sasaki¹,

Nakamura²,

Gu³

et al. 2023

Preprint

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“…When an external magnetic field is applied, magnetic NPs, for instance, can be directed to a single cell or organ of interest. Cancer hyperthermia treatment relies on the fact that an alternating magnetic field may be utilized to selectively heat the region in which magnetic particles are concentrated [ 35 ]. It is also possible to employ aqueous dispersions of superparamagnetic NPs as contrast agents for MRI (MRI) [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Bioimaging Probes Based on Magneto-Fluorescent Nanoparticles

Ganguly

Margel

2023

Pharmaceutics

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Novel nanomaterials are of interest in biology, medicine, and imaging applications. Multimodal fluorescent-magnetic nanoparticles demand special attention because they have the potential to be employed as diagnostic and medication-delivery tools, which, in turn, might make it easier to diagnose and treat cancer, as well as a wide variety of other disorders. The most recent advancements in the development of magneto-fluorescent nanocomposites and their applications in the biomedical field are the primary focus of this review. We describe the most current developments in synthetic methodologies and methods for the fabrication of magneto-fluorescent nanocomposites. The primary applications of multimodal magneto-fluorescent nanoparticles in biomedicine, including biological imaging, cancer treatment, and drug administration, are covered in this article, and an overview of the future possibilities for these technologies is provided.

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Magnetic Imaging with Spin Defects in Hexagonal Boron Nitride

Cited by 31 publications

References 39 publications

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂

Magnetic field imaging by hBN quantum sensor nanoarray

Bioimaging Probes Based on Magneto-Fluorescent Nanoparticles

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Magnetic Imaging with Spin Defects in Hexagonal Boron Nitride

Cited by 31 publications

References 39 publications

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe5GeTe2

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe5GeTe2

Magnetic field imaging by hBN quantum sensor nanoarray

Bioimaging Probes Based on Magneto-Fluorescent Nanoparticles

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Product

Resources

About

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂

Above-Room-Temperature Ferromagnetism in Thin van der Waals Flakes of Cobalt-Substituted Fe₅GeTe₂