We then explore the possibility of current-induced domain-wall motion, and provide preliminary evidence for such a motion under relatively low current densities, suggesting the existence of strong current-induced torques in our devices. We first observe current-reduced coercivity on an individual domain level, where current injection in FGT causes substantial reduction in the magnetic field required to locally reverse the magnetisation. Here we use a widefield NV microscope to study the effect of current injection in thin flakes ($\sim10$nm) of the vdW ferromagnet Fe$_3$GeTe$_2$ (FGT). Widefield nitrogen-vacancy (NV) microscopy allows rapid, quantitative magnetic imaging across entire vdW flakes, ideal for capturing changes in the micromagnetic structure due to an electric current. switching or domain wall motion), but so far experimental demonstrations have been sparse, in part because of challenges associated with imaging the magnetization in these systems.
Van der Waals (vdW) magnets are appealing candidates for realising spintronic devices that exploit current control of magnetization (e.g.
Our results may lay out a general framework for the design of energy-efficient spintronics based on configurable vdW FMs. Moreover, the presence of the Coulomb interaction at the CrTe2/Al2O3 interface serves as an effective tuning parameter to tailor the anomalous Hall response, and the structural optimization of the CrTe2-based spin-orbit torque device leads to a substantial switching power reduction by 54%. Benefiting from the uniform surface energy of the dangling bond-free Al2O3(0001) surface, the layer-by-layer vdW growth mode is observed right from the initial growth stage, which warrants precise control of the sample thickness and atomically smooth surface morphology across the entire wafer. Here, we demonstrate the epitaxial growth of single-crystalline 1T-CrTe2 thin films on 2-inch sapphire substrates. To harness the intriguing properties of two-dimensional van der Waals (vdW) ferromagnets (FMs) for versatile applications, the key challenge lies in the reliable material synthesis for scalable device production. Introduction of the theory of mutual information is the key to the resounding success of this framework. Historical validation of predictions demonstrates its remarkable capacity for accelerating experimental discovery of 2D vdW magnets. This work establishes the first computational framework capable of capturing 2D van der Waals (vdW) magnets with high probability for experimental demonstration. This framework has the potential to become a revolutionary force for progressing experimental discovery of 2D vdW magnets. For example, half of the 30 2D vdW magnets discovered in the literature published prior to 2017 have been experimentally demonstrated in the subsequent years. Historical validation of predictions substantiates the high reliability of the framework. The key to the successful establishment is the introduction of the theory of mutual information.
Via the framework, 2D vdW magnets with high probability for experimental demonstration are captured from materials science literature.
Herein, a new framework can be established to overcome this challenge. Machine learning techniques and density functional theory calculations enable the discovery of 2D vdW magnets to be accelerated however, current computational frameworks based on these state‐of‐the‐art approaches cannot offer probability analysis on whether a 2D vdW magnet can be experimentally demonstrated. 2D van der Waals (vdW) magnets have opened intriguing prospects for next‐generation spintronic nanodevices.
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