Simulation
Software
Quloud-Mag is material simulation software that supports magnetic material development and magnetic device development. Up until now, simulations of magnetic properties have not been able to achieve sufficient accuracy, but the method developed by our company allows us to estimate material properties through first-principles calculations without using experimental values, making it possible to efficiently and comprehensively estimate material properties. Enables material exploration. It is a useful tool for research and development of magnetic materials, including magnet materials, soft magnetic materials, magnetic nanoparticles, magnetocaloric effects, skyrmions, etc.
Click here for an explanatory article about Quloud-Mag
Power of Quloud-Mag
01
Basic magnetic order simulation
02
Magnetic state simulation at finite temperature
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Magnetic state simulation under external magnetic field
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Analysis of doping effects
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Magnetization dynamics simulation for external field
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Magnetic property simulation by combining experimental data
Function
Functions of Quloud-Mag
Simulation of magnetic material (bulk, thin-film, and micro-to nanoparticle) properties with high accuracy based only on chemical composition ratios and structural information. Furthermore, experimental values can be merged with simulations, which can further improve the accuracy of the simulations. Custom-made simulation systems can also be constructed.
Strength of Quloud-Mag
Method
Method of Quloud-Mag
Using density functional theory (DFT), electronic structure calculations are performed based on atomic structures.
From the obtained electronic structure results, the Heisenberg Hamiltonian is constructed. Monte Carlo calculations are then performed on the obtained Heisenberg Hamiltonian.
Micromagnetic simulation is performed using the results of the Monte Carlo and electronic structure calculations.
CASE
Calculation of Entropy Change (Magnetocaloric Material Development)
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The magnetocaloric effect has been the focus of considerable research attention as a next-generation refrigeration method. Therefore, the search for magnetic materials that exhibit a large magnetocaloric effect is currently active.
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Entropy change is an important index for determining the magnitude of the magnetocaloric effect.
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The La–Fe–Si system is considered a potential refrigerant material for air conditioners. There is thus an active search for dopants that have Curie temperatures close to room temperature.
CASE 01
Background
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High-precision simulation of entropy change with changes in the external magnetic field and other conditions.
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Visualization of the relationship between composition ratio and Curie temperature.
Simulation Results
Experimental (left) and simulated (right) entropy changes with varying magnetic field and temperature upon addition of a specific dopant at fixed composition ratios.
POINT
Changes in Curie temperature with different concentrations of a specific dopant.
POINT
Acta Mater. 231, 117851 (2022); arXiv:2207.10408 (2022)
Skyrmions Magnetic Phase in Two-Dimensional Layered MX3 Material
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The skyrmions phase, in which spins form a spiral order, has been reported only in systems with broken spatial inversion symmetries.
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There have been no previous studies on the skyrmions phase in van der Waals centrosymmetric 2D materials. This is the first report of such a phase.
CASE 02
NEWS
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Magnetic phase diagram of van der Waals centrosymmetric 2D materials MX3 can be reproduced by simulations.
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Simulation of magnetic order in van der Waals centrosymmetric 2D materials MX3 (X = Cl) reveals that the Dzyaloshinskii–Moriya interactions is finite owing to local spatial inversion symmetry breaking.
NEWS
Magnetization phase diagram of 2D material MX3 (X=Cl) (left).
Magnetic susceptibility phase diagram of 2D material MX3 (X=Cl) (right).
POINT
The magnetic configuration with two types of skyrmions lattice in MX3 (X=Cl).The red and blue arrows indicate the upward and downward spin components, respectively.
POINT
arXiv:2209.02333 (2022).
Magnetic Properties of Magnetic Nanoparticles
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Magnetic nanoparticles are currently being used in a variety of applications, including memory devices and medical applications.
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This is the first software that simulates magnetic nanoparticles without requiring experimental values.
CASE 03
NEWS
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The relationship between nanoparticle size and Curie temperature can be simulated with high accuracy.
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The magnetization resolved of magnetic nanoparticles can be visualized.
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Simulation of hysteresis.
NEWS
Curie temperature dependence of particle size-comparison of experimental an simulation results.
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Simulation results of spatial distribution of magnetic moment in magnetic nanoparticles.
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Simulation of hysteresis in magnetic nanoparticles.
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鉄の電気抵抗―シミュレーション結果と実験値の比較
POINT
鉄に振動磁場が入力された際の磁気応答のシミュレーション
POINT
鉄の複素透磁率のシミュレーション
POINT
Magnetic Loss
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To develop energy-saving devices, quantifying the energy loss when an oscillating magnetic field is applied is important.
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Energy loss comprises Eddy current loss and hysteresis loss.
CASE 04
NEWS
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Electrical resistance-an important factor in the calculation of Eddy current losses- can be simulated with high accuracy.
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δt can be estimated from the simulation of the magnetic response.
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Simulation of complex permeability, which was previously difficult, is now possible.
