Modern Magnetic Materials

Hoselitz, K.

doi:10.1088/0031-9112/13/4/003

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…Based on the hexagonal symmetry of the Cr 2 X 3 crystal structure in the ab plane and localized magnetic moments, the angular dependence of the MAE on the magnetization angle θm can be fit by the equation, MAE(θ) = K 1 sin 2 (θ m ) + K 2 sin 4 (θ m ), where K 1 and K 2 are the magnetocrystalline anisotropy coefficients and θ m is the magnetization angle. − Figure b shows a good fit of the MAE(θ m ) equation to the results. Here, K 1 values are obtained as 28.67, 186.1, and −315.88 μeV/Cr, while K 2 values are −0.02, 0.66, and −129.29 μeV/Cr for Cr 2 S 3 , Cr 2 Se 3 , and Cr 2 Te 3 , respectively.…”

Section: Resultsmentioning

confidence: 84%

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications

Gebredingle

Joe

Lee

2022

ACS Appl. Nano Mater.

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First-principles calculations are performed to study the electronic and magnetic properties of non-van der Waals (vdW) chromium chalcogenide Cr2X3 (X = S, Se, Te). Our results unveil their spin-dependent properties with strain tunability. Cr2Se3 is an intrinsic half-metal with a fully compensated ferrimagnetic (FCFiM) state. Cr2S3 is a bipolar magnetic semiconductor with an FCFiM state and half-semiconductor under a slight strain. Cr2Te3 is a conventional metal with a ferromagnetic (FM) state. Straining is feasible for this material to tune the band gap spin-selectively and induce magnetic phase transition. The interplay between inequivalent Cr sites under strains reveals that interlayer magnetic interaction mainly contributes to the system’s magnetic configuration and favors the antiferromagnetic (AFM) state through direct exchange coupling if the spacing is smaller than 3 Å (responsible for both S and Se) but selects the FM state through superexchange-like interactions (responsible for Te) for longer spacing. While in-plane magnetic anisotropy is observed for S and Se, strong perpendicular magnetic anisotropy is dominant for Te. Our results will further stimulate studies of non-vdW materials and their potential for future spintronics applications.

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Section: Resultsmentioning

confidence: 84%

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications

Gebredingle

Joe

Lee

2022

ACS Appl. Nano Mater.

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“…The change of shape demagnetization factor has been used to design unique soft magnetic microrobots. When the aspect ratios of modules are different, this results in a variety of shape demagnetization [92]. Constant cross-section and constant length approaches are used to introduce different aspect ratios.…”

Section: Heterogeneous Designmentioning

confidence: 99%

Formation Techniques Used in Shape-Forming Microrobotic Systems with Multiple Microrobots: A Review

et al. 2022

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Multiple robots are used in robotic applications to achieve tasks that are impossible to perform as individual robotic modules. At the microscale/nanoscale, controlling multiple robots is difficult due to the limitations of fabrication technologies and the availability of on-board controllers. This highlights the requirement of different approaches compared to macro systems for a group of microrobotic systems. Current microrobotic systems have the capability to form different configurations, either as a collectively actuated swarm or a selectively actuated group of agents. Magnetic, acoustic, electric, optical, and hybrid methods are reviewed under collective formation methods, and surface anchoring, heterogeneous design, and non-uniform control input are significant in the selective formation of microrobotic systems. In addition, actuation principles play an important role in designing microrobotic systems with multiple microrobots, and the various control systems are also reviewed because they affect the development of such systems at the microscale. Reconfigurability, self-adaptable motion, and enhanced imaging due to the aggregation of modules have shown potential applications specifically in the biomedical sector. This review presents the current state of shape formation using microrobots with regard to forming techniques, actuation principles, and control systems. Finally, the future developments of these systems are presented.

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“…This has led to an enhancement in the understanding of the characteristics which are responsible for the individual material magnetoactive properties. In this scenario, both basic knowledge and device integration and applications have stimulated each other so that a large volume of scientific and technological work has been performed [53] .…”

Section: Final Remarks and Future Perspectivesmentioning

confidence: 99%

Magnetic field into multifunctional materials

Martins

Lanceros‐Méndez

2021

Advanced Lightweight Multifunctional Materials

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Modern Magnetic Materials

Cited by 5 publications

References 9 publications

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications

Formation Techniques Used in Shape-Forming Microrobotic Systems with Multiple Microrobots: A Review

Magnetic field into multifunctional materials

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Modern Magnetic Materials

Cited by 5 publications

References 9 publications

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr2X3 (X = S, Se, Te): Implications for Spintronics Applications

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr2X3 (X = S, Se, Te): Implications for Spintronics Applications

Formation Techniques Used in Shape-Forming Microrobotic Systems with Multiple Microrobots: A Review

Magnetic field into multifunctional materials

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Product

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First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications

First-Principles Calculations of the Spin-Dependent Electronic Structure and Strain Tunability in 2D Non-van der Waals Chromium Chalcogenides Cr₂X₃ (X = S, Se, Te): Implications for Spintronics Applications