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68 results for “antiferromagnetic”
Data underpinning "Noncoplanar magnetic order in classical square-kagome antiferromagnets"
<p>Motivated by the recent synthesis of a number of Mott insulating square-kagome materials, we explore the rich phenomenology of frustrated magnetism induced by this lattice geometry, also referred to as the squagome or shuriken lattice. On the classical level, square-kagome antiferromagnets are found to exhibit extensive degeneracies, order-by-disorder, and non-coplanar ordering tendencies, which we discuss for an elementary, classical Heisenberg model with nearest-neighbor and cross-plaquette interactions. Having in mind that upon introducing quantum fluctuations non-coplanar order can melt into chiral quantum spin liquids, we provide detailed information on the multitude of non-coplanar orders, including some which break rotational symmetry (possibly leading to nematic quantum orders), as well as a number of (incommensurate) spin spiral phases. Using extensive numerical simulations, we also discuss the thermodynamic signatures of these phases, which often show multi-step thermal ordering. Our comprehensive discussion of the classical square-kagome Heisenberg model, often drawing comparisons to the conventional kagome antiferromagnet, sets the stage for future explorations of quantum analogs of the various phases, either conceptually such as in quantum spin-1/2 generalizations of our model or experimentally such as in the Cu-based candidate materials.</p>
Data for "Interplay of magnetic order and ferroelasticity in the spin-orbit coupled antiferromagnet K2ReCl6" published in PRB 109, 094409 (2024)
<p>The manuscript of paper is also available on arXiv:2207.11101</p> <p>The manuscript of this <a href="https://doi.org/10.1103/PhysRevB.109.094409">Phys. Rev. B paper</a> is also available on arxiv <a href="https://arxiv.org/abs/2207.11101">2401.03064</a>. </p> <p> </p>
Dataset for "Three-dimensional spin-wave dynamics, localization and interference in a synthetic antiferromagnet"
<p>Data availability for the article titled "Three-dimensional spin-wave dynamics, localization and interference <br>in a synthetic antiferromagnet" by Girardi et al. published in Nature Communications.</p> <p>This data repository contains the following folders and files:<br>• TR Lamni Raw Data - Co: Files with extension .hdf5 are Time-Resolved Soft X-Ray Laminography Raw Data for all projections acquired to obtain the 3D reconstruction for the CoFeB layer. The projections’ data have been organized in sub-folders for the 7 frames acquired during the measurements. For each frame, a final folder “analysis” contains an aligned_projection.mat file with the angles of all measured projections and the sinogram information.<br>• TR Lamni Raw Data - Ni: Files with extension .hdf5 are Time-Resolved Soft X-Ray Laminography Raw Data for all projections acquired to obtain the 3D reconstruction for the NiFe layer. The projections’ data have been organized in sub-folders for the 7 frames acquired during the measurements. For each frame, a final folder “analysis” contains an aligned_projection.mat file with the angles of all measured projections and the sinogram information.<br>• Magnetic reconstruction – Ni edge: contains the .mat files of the 3D magnetic reconstruction obtained for Ni-edge for all 7 frames. In each file, the Mx, My and Mz components of the magnetization associated with the 3D reconstruction of the volume of the sample are present. <br>• Magnetic reconstruction – Co edge: contains the .mat files of the 3D magnetic reconstruction obtained for Co-edge for all 7 frames. In each file, the Mx, My and Mz components of the magnetization associated with the 3D reconstruction of the volume of the sample are present. <br>• vtk files: contains the post-processed files for all 7 frames in the .vtk format for the 3D visualization with the Paraview software. In each file, both vectorial and scalar data associated with the 3D reconstruction of the volume of the sample and analyzed in the paper are present.<br>• Mumax3 simulation dispersion relation: contains .ovf files (containing information about the Mx, My, Mz components of the magnetization as a function of the spatial position) obtained from the mumax3 simulation to study the spin wave dispersion relation of the sample investigated. The total simulation runtime is 10 ns, and each .ovf file corresponds to a frame saved every 0.01 ns.<br>• Mumax3 simulation 3D interference: contains the .ovf files (containing information about the Mx, My, Mz components of the magnetization as a function of the spatial position) for the static magnetization and 3 frames used to simulate the 3D interference pattern observed experimentally. </p>
Dataset for: "Phase Coexistence of Mn Trimer Clusters and Antiferromagnetic Mn Islands on Ir(111)"
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Impact of gigahertz and terahertz transport regimes on spin propagation and conversion in the antiferromagnet IrMn
<p>Data for the publication "Impact of gigahertz and terahertz transport regimes on spin propagation and conversion in the antiferromagnet IrMn" published in Applied Physics Letters. The following datasets are provided: GHz and THz raw data as function of the IrMn thickness, THz raw data spectra of the Pt|AF|F sample set, GHz and THz charge currents for forward (N|AF|F) and reversly-grown (F|AF|N) trilayer samples for N= Pt, W and Ta with varying AF thickness as well as the frequency-dependence of the charge current in the THz regime. Moreover, the temporal dynamics of the spin current densities from IrMn thicknesses 0nm, 3nm and 6nm are supplied.</p>
X-ray investigation of long-range antiferromagnetic ordering in FeRh
<p>Open data to "X-ray investigation of long-range antiferromagnetic ordering in FeRh" published in AIP Advances <strong>12</strong>, 035048 (2022); <a href="https://doi.org/10.1063/9.0000320">https://doi.org/10.1063/9.0000320</a></p>
Guiding antiferromagnetic transitions by substitution in Ca2RuO4
<p>Data and analysis scripts for the publication "Guiding antiferromagnetic transitions by substitution in Ca<sub>2</sub>RuO<sub>4</sub>" .</p> <p>Characterisation and Resonant x-ray diffraction data from single crystals of Mn doped Ca2RuO4.</p> <p>Included in this repository are the following data:</p> <ul> <li>Single Crystal X-Ray Diffraction <ul> <li>Refined CIFs from x-ray diffraction experiments on Ca<sub>2</sub>Ru<sub>1-x</sub>Mn<sub>x</sub>O<sub>4</sub> with x=0,3,5,10,20% at temperatures 90-500K.</li> <li>Python scripts to determine the exchange path distances</li> <li>Python scripts to create figures</li> </ul> </li> <li>Magnetisation Data <ul> <li>Data files from Quantum Design SQUID VSM measurements of Ca<sub>2</sub>Ru<sub>1-x</sub>Mn<sub>x</sub>O<sub>4</sub> with x=0,3,5,10,20%. Field Cooled measurements in different orientations relative to the external field are included.</li> </ul> </li> <li>Resonant X-Ray Diffraction Data <ul> <li>Raw scan files from I16 measurements covering multiple beamtime allocations on samples of Ca<sub>2</sub>Ru<sub>1-x</sub>Mn<sub>x</sub>O<sub>4</sub> with x=0,3,5,10,20%.</li> <li>Analysed datasets including python scripts with descriptions of data analysis and figure plots.</li> </ul> </li> </ul>
Figure source data for 'Coherent spin-wave transport in an antiferromagnet'
<p>This repository contains figure source data for 'Coherent spin-wave transport in an antiferromagnet'</p> <p> </p> <p><strong>Contents</strong></p> <p><em>Figure 1:</em></p> <p>(a) optical absorption DyFeO3 for different photon energies: 1a_absorption.txt</p> <p>(b) Penetration depth for different photon energies: 1a_penetetrationdepth.txt</p> <p>(c) Time-resolved polarization rotation for transmission and reflection geometries: 1c_time-resolved.txt</p> <p>Fourier amplitude spectra for different geometrie: 1c_FourierInsets</p> <p><em>Figure 2:</em></p> <p>(b) Extracted oscillation frequencies as function of temperature: 2b_frequencies.txt</p> <p><em>Figure 3</em></p> <p>(a) Time-resolved polarization rotation for different photon energies (folder figure3a)</p> <p>(b) Amplitude spectra of the time-resolved polarization rotation for different photon energies (folder figure3b)</p> <p>(c) Amplitude vs penetration depth: 3c.txt</p> <p><em>Figure 4</em></p> <p>(a) Time- and space dependent amplitude: 4a.txt</p> <p>(b) Fourier spectra for different incidence angles + data-inset: 4b.txt</p> <p>(c) Fourier spectra for different probe wavelengths: 4c.txt</p> <p>(d) Extracted central frequencies and calculated group velocity for different wavenumbers: 4de.txt</p> <p> </p> <p>. </p>
Terahertz light–driven coupling of antiferromagnetic spins to lattice
<p>Data set for the paper titled "Terahertz light–driven coupling of antiferromagnetic spins to lattice".</p>
Spin-split collinear antiferromagnets: a large-scale ab-initio study
<p>Data set associated with our work "Spin-split collinear antiferromagnets: a large-scale ab-initio study".</p> <p>It contains input files for ab-initio calculations for over sixty compounds, resulting band structures, as well as tools used to generate two-band models.</p>
Current-driven writing process in antiferromagnetic Mn_2Au for memory applications
<p>Current pulse induced resistance changes in Mn2Au(001) epitaxial thin films associated with Néel vector reorientation.</p>
Controlling magnetism with light in a zero orbital angular momentum antiferromagnet
<p>Data of publication figures, and the complete dataset collected during the experiments.</p>
Probing the topologically trivial nature of end states in antiferromagnetic atomic chains on superconductors
<p>This .zip file includes the Mathematica Notebook used to create all figures of the main text as well as the relevant raw data needed to reproduce the results of the paper.</p>
Multi-state Data Storage in a Two-dimensional Stripy Antiferromagnet Implemented by Magnetoelectric Effect
<p>Source data for: Multi-state Data Storage in a Two-dimensional Stripy Antiferromagnet Implemented by Magnetoelectric Effect</p>
Figure source data for 'Ultrafast activation of the double-exchange interaction in antiferromagnetic manganites'
<p>This repository contains figure source data for 'Ultrafast activation of the double-exchange interaction in antiferromagnetic manganites'</p>
Coupled magnetic and structural phase transitions in antiferromagnetic polar metal Pb2CoOsO6 under pressure
<p>This data repo. includes the optimized structures of Pb2CoOsO6 under pressures up to 9 GPa. The structures were fully optimized in the DFT calculations using VASP code. </p>
Imaging non-collinear antiferromagnetic textures via single spin relaxometry
<p>Data related to the publication, arXiv 2006.13130.</p>
Data Files for "Quadrupolar magnetic excitations in an isotropic spin-1 antiferromagnet"
<p>Data files for the manuscript "Quadrupolar magnetic excitations in an isotropic spin-1 antiferromagnet".</p> <p>Reference: A. Nag, A. Nocera, S. Agrestini, M. Garcia-Fernandez, A. C. Walters, Sang-Wook Cheong, S. Johnston, and Ke-Jin Zhou, "Quadrupolar magnetic excitations in an isotropic spin-1 antiferromagnet". Nature Communications 13, 2327 (2022).</p> <p>Preprint: arXiv:2111.03625 (2021), URL: https://arxiv.org/abs/2111.03625</p>
Dataset for "Electric-field-enhanced second-harmonic domain contrast and nonreciprocity in a van der Waals antiferromagnet"
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Data Repository for: Machine-learning the spectral function of a hole in a quantum antiferromagnet
<p>The machine-learning dataset of 51^3 ~1.3 × 10^5 density of states (DOS) of a mobile hole in the t-t'-t''-J model theoretically generated by using the self-consistent Born approximation in the three-dimensional parameter space of t′ ∈ [−0.5, 0.5], t′′ ∈ [−0.5, 0.5] and J ∈ [0.2, 1.0], with each parameter sampled on a 51-point uniform grid. The dataset is randomly partitioned into an 80/10/10 training (T), validation (V), and testing T split. Note that each DOS A(ω) was calculated on a 1201-point uniform grid of ω ∈ [−6t, 6t], then it was resampled on a 301-point uniform grid for the forward problem and on a 354-point uniform grid for the inverse problem. The dataset used in the inverse problem is limited to the parameter space of t′ ∈ [−0.5, 0], t′′ ∈ [0, 0.5] and J ∈ [0.2, 1.0]. To open the enclosed .npz files, use numpy.load() in python3.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.