Hard magnetic properties in nanoflake van der Waals Fe3GeTe2

Tan, Cheng; Lee, Sung Yong; Jung, Soon‐Gil; Park, Tuson; Albarakati, Sultan; Partridge, J. G.; Field, Matthew R.; McCulloch, D. G.; Wang, Lin-Lin; Lee, Changgu

doi:10.1038/s41467-018-04018-w

Cited by 345 publications

(364 citation statements)

References 56 publications

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“…Another transition can be seen in very thin samples through the deviation of the dependence of Tc on the number of layers from the expected scaling behaviour in equation (1). For samples above ~5 layers, the thickness dependence follows equation (1), with the constant C corresponding to approximately 2-3 layers 59,60 and λ of the order of 1.7 -close to what is expected for 3D Heisenberg ferromagnetism 59,60 . Deviations from this behaviour occur for thinner samples, which has been taken as an indication for a transition from 3D to 2D behaviour 59 .…”

Section: Fe 3 Getesupporting

confidence: 59%

Magnetic 2D materials and heterostructures

et al. 2019

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The family of 2D materials grows day by day, drastically expanding the scope of possible phenomena to be explored in two dimensions, as well as the possible van der Waals heterostructures that one can create. Such 2D materials currently cover a vast range of properties. Until recently, this family has been missing one crucial member -2D magnets. The situation has changed over the last two years with the introduction of a variety of atomically-thin magnetic crystals. Here we will discuss the difference between magnetic states in 2D materials and in bulk crystals and present an overview of the 2D magnets that have been explored recently. We will focus, in particular, on the case of the two most studied systems -semiconducting CrI3 and metallic Fe3GeTe2 -and illustrate the physical phenomena that have been observed. Special attention will be given to the range of novel van der Waals heterostructures that became possible with the appearance of 2D magnets, offering new perspectives in this rapidly expanding field.

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Section: Fe 3 Getesupporting

confidence: 59%

Magnetic 2D materials and heterostructures

et al. 2019

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“…For thin FGT, there is only a ferromagnetic‐to‐paramagnetic transition at a single temperature; whereas for thick FGT, labyrinthine‐domains appear in a temperature range from T C1 to T C2 , due to decrease in the ratio between the strength of out‐of‐plane anisotropy and that of exchange interactions with increasing temperature. The hard magnetism observed for different FGT thicknesses has also been demonstrated by Lee et al by anomalous Hall effect measurements …”

Section: Progress On Van Der Waals Magnets and Heterostructuressupporting

confidence: 76%

“…The hard magnetism observed for different FGT thicknesses has also been demonstrated by Lee et al by anomalous Hall effect measurements. 89…”

Section: Fe-based Vdw Magnetsmentioning

confidence: 99%

Van der Waals magnets: Wonder building blocks for two‐dimensional spintronics?

Zhang

Wong

Zhu

et al. 2019

InfoMat

107

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The unprecedented realization of two‐dimensional (2D) van der Waals magnets excitingly extends the synergy between spintronics and 2D materials, started with graphene over the last decade. This article reviews the recent milestones in the development of 2D magnets and its derived heterostructures. In particular, a number of critical challenges centered around the scalability, ambient stability and Curie temperature of these atomically thin magnets are discussed. This mini‐review also provides an outlook on what the future might hold for this integrated field of 2D spintronics, and assesses its potential in postsilicon electronics.

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“…Fe spins in Fe3Sn2 are separated by Sn into bilayer Kagome planes, and their magnetism and topological band structure are quasi-two-dimensional. Interestingly, similar magnetic and electronic properties have recently been discovered for other Kagome systems such as Co3Sn2S2 [10] and van der Waals metals such as Fe3GeTe2 [28,29], for which both low-dimensional ferromagnetism and anomalous Hall effect have been observed. Manipulating the mesoscopic magnetic textures in these materials can give rise to a new control of their topological properties.…”

Section: (Received 25 June 2019)supporting

confidence: 63%

Magnetic-Field Control of Topological Electronic Response near Room Temperature in Correlated Kagome Magnets

Wang

DeBeer‐Schmitt

et al. 2019

Phys. Rev. Lett.

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Strongly correlated Kagome magnets are promising candidates for achieving controllable topological devices owing to the rich interplay between inherent Dirac fermions and correlation-driven magnetism. Here we report tunable local magnetism and its intriguing control of topological electronic response near room temperature in the Kagome magnet Fe3Sn2 using small angle neutron scattering, muon spin rotation, and magnetoresistivity measurement techniques. The average bulk spin direction and magnetic domain texture can be tuned effectively by small magnetic fields. Magnetoresistivity, in response, exhibits a measurable degree of anisotropic weak localization behavior, which allows the direct control of Dirac fermions with strong electron correlations. Our work points to a novel platform for manipulating emergent phenomena in strongly-correlated topological materials relevant to future applications.The tunability of topologically protected states through interactions between magnetism and electronic band structure provides a novel route towards designing complex quantum materials for technological applications. Theoretically, Kagome structures that break time-reversal symmetry have been proposed to host nontrivial topological electronic states with controllability provided by local magnetism [1][2][3][4][5]. Experimental investigations of these proposals have been recently made possible, with the discovery of inherent Dirac/Weyl fermions and magnetism-related Berry curvature in strongly-correlated

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Hard magnetic properties in nanoflake van der Waals Fe3GeTe2

Cited by 345 publications

References 56 publications

Magnetic 2D materials and heterostructures

Magnetic 2D materials and heterostructures

Van der Waals magnets: Wonder building blocks for two‐dimensional spintronics?

Magnetic-Field Control of Topological Electronic Response near Room Temperature in Correlated Kagome Magnets

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