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28 results for “magnetite”
Data set for: Mapping magnetic signals of individual magnetite grains to their internal magnetic configurations using micromagnetic models
<p>This data set contains the simulations and data analysis files used in the publication: "<em>Mapping magnetic signals of individual magnetite grains to their internal magnetic configurations using micromagnetic models</em>", by D. Cortés-Ortuño, K. Fabian and L. V. de Groot.</p> <p>The data set includes:</p> <ul> <li>Scripts and output files from MERRILL simulations</li> <li>Jupyter notebooks with data analysis</li> <li>Figures</li> </ul> <p>A preprint of this work can be found in:</p> <p>David Cortés-Ortuño, Karl Fabian and Lennart V. de Groot. <em>Mapping magnetic signals of individual magnetite grains to their internal magnetic configurations using micromagnetic models.</em> DOI: 10.1002/essoar.10510574.1. Earth and Space Science Open Archive. <a href="https://doi.org/10.1002/essoar.10510574.1">https://doi.org/10.1002/essoar.10510574.1</a></p> <p>The README file in this dataset (in markdown format) contains full details about the simulations. The dataset also contains pre-computed data files to calculate the inversions and produce the figures and analyze the inversion data without processing the vbox files.</p> <p>To cite this dataset you can use the following bibtex entry:</p> <pre><code>@Misc{Cortes2022, author = {Cortés-Ortuño, David and Fabian, Karl and de Groot, Lennart V.}, title = {{Data set for: Mapping magnetic signals of individual magnetite grains to their internal magnetic configurations using micromagnetic models}}, publisher = {Zenodo}, year = {2022}, doi = {10.5281/zenodo.6501818}, url = {https://doi.org/10.5281/zenodo.6501818}, } </code></pre> <p> </p>
Micromagnetic Hysteresis Results for Magnetite
<p>The repository contains the data and example scripts to reproduce a systematic micromagnetic analysis of magnetic hysteresis in magnetite nad serves as the supplementary material for the paper "Magnetic Hysteresis Properties of Magnetite: Trends with Particle Size and Shape"</p> <p><strong>Files:</strong></p> <p><em>truncated_octahedron_prolate_by_AR.cubit</em> - Coreform Cubit script to create the prolate finite element meshed geometries<br><em>truncated_octahedron_oblate_by_AR.cubit</em> - Coreform Cubit script to create the oblate finite element meshed geometries</p> <p><em>Example_MERRILL_Script.txt</em> - Example MERRILL script to simulate the major hysteresis loops</p> <p><em>Hysteresis_Data.db</em> - SQLite binary file containing room temperature magnetic hysteresis loops and associated data.</p> <p><em>Paleointensity_Transient_Data.csv</em> - The transient hysteresis (Thys), Arai plot curvature, and palaeointensity data used in Figure 11.</p> <p> </p> <p><em>M1_AR2p50_Size125_i08.mp4:</em></p> <p>Domain state evolution through a major hysteresis loop from positive saturation to the zero-field state and the transient branch sweep back to saturations. This is for a 125 nm pastilce with an aspect ratio of 2.5. The video illustrates near reversible single vortex nucleation and denucleation that yields negligible transient hysteresis behvaior.</p> <p><em>M2_AR1p50_Size125_i22.mp4 </em></p> <p>Domain state evolution through a major hysteresis loop from positive saturation to the zero-field state and the transient branch sweep back to saturations. This is for a 125 nm pastilce with an aspect ratio of 1.5. The video illustrates irreversible single vortex nucleation and denucleation that result from irreversivle vortex core rotation. This yields notable transient hysteresis behvaior.</p> <p>M3_AR1p50_Size125_i08.mp4</p> <p>Domain state evolution through a major hysteresis loop from positive saturation to the zero-field state and the transient branch sweep back to saturations. This is for a 125 nm pastilce with an aspect ratio of 1.5. The video illustrates near reversible single vortex rotation that yields negligible transient hysteresis behvaior.</p> <p><em>M4_AR0p500000_Size125_i17.mp4 </em></p> <p>Domain state evolution through a major hysteresis loop from positive saturation to the zero-field state and the transient branch sweep back to saturations. This is for a 125 nm pastilce with an aspect ratio of 0.5. The video illustrates irreversible single vortex nucleation and denucleation that result from irreversivle vortex core translation. This yields notable transient hysteresis behvaior.</p> <p><em>M5_AR0p500000_Size125_i15.mp4 </em></p> <p>Domain state evolution through a major hysteresis loop from positive saturation to the zero-field state and the transient branch sweep back to saturations. This is for a 125 nm pastilce with an aspect ratio of 0.5. The video illustrates near reversible single vortex translation that yields negligible transient hysteresis behvaior.</p> <p> </p> <p><br><strong>Hysteresis_Data.db structure:</strong></p> <p>Hysteresis_Data.db contains 6 tables</p> <p>DCD_Loops - the DC backfield demagnetization data<br>Hyst_Loops - the upper branch major hysteresis data<br>Hyst_Stats - the summary hysteresis descriptive statistics<br>Loop_Units - the unist for the column of the "DCD_Loops", "Hyst_Loops ", and "Transient_Loops" tables<br>Stat_Units - the units for the column of the "Hyst_Stats" table<br>Transient_Loops - the transient loop data</p>
Measured magnetic susceptibility data for different magnetite tracer stacking scenarios
<p>Dataset includes measured data of the volume magnetic susceptibility of 36 artificial soil profiles with various distribution of magnetic tracer. The monitoring was done with Bartington MS2D field probe.</p> <p>The dataset was created for the fitting and calibration of the parameters of a MagHut model. The model and the procedure is described in a manuscript by Zumr D., Li T., Gómez J., Guzmán G., Modelling the response of a field probe for non-destructive measurements of the magnetic susceptibility of soils (to date of the data submission under review).</p>
Dataset for publication Sikora P., El-Khayatt A.M., Saudi H.A., Liard M., Lootens D., Chung S.-Y., Woliński P., Abd Elrahman M. Rheological, mechanical, microstructural and radiation shielding properties of cement pastes containing magnetite (Fe3O4) nanoparticles. International Journal of Concrete Structures and Materials (2023), 17, 7
<p>Open dataset for publication Sikora P., El-Khayatt A.M., Saudi H.A., Liard M., Lootens D., Chung S.-Y., Woliński P., Abd Elrahman M. Rheological, mechanical, microstructural and radiation shielding properties of cement pastes containing magnetite (Fe3O4) nanoparticles. International Journal of Concrete Structures and Materials (2023), 17, 7. https://doi.org/10.1186/s40069-022-00568-y</p> <p>File 1 - X-ray diffractogram and particle size distribution (laser granulometry) data - *.opju (Origin)<br> File 2 - Rheological test results - *.opju (Origin)<br> File 5 - Mechanical peformance (early strength - ultrasounds and compressive strength) and density test results - *.opju (Origin)<br> File 4 - Mercury intrusion porosimetry test data - *.opju (Origin)</p>
Micromagnetic calculation of the magnetite magnetosome in magnetotactic bacteria
<p>This dataset contains the micromagnetic model meshes, MATLAB codes, and calculation results of typical magnetite magnetosome in magnetotactic bacteria.</p>
Magnetite in Muong Nong-type Australasian tektites from South China
<p>This supporting information provides the raw data that are used in the main article. Note that the research paper contained all raw data updated on the zenodo data repository is under review.</p>
Pentavalent U reactivity impacts U isotopic fractionation during reduction by magnetite
<p>Original data pertaining to the manuscript 'Pentavalent U reactivity impacts U isotopic fractionation during reduction by magnetite' published in Environmental Science and Technology by Zezhen Pan, Luca Loreggian, Yvonne Roebbert, Barbora Bartova, Myrtille O.J.Y. Hunault, Stefan Weyer, Rizlan Bernier-Latmani.</p> <p><a href="https://doi.org/10.1021/acs.est.3c10324">https://doi.org/10.1021/acs.est.3c10324</a></p>
Demagnetization energy and internal stress in magnetite from temperature dependent hysteresis measurements - temperature hysteresis data
<p><strong>Data set of hysteresis data files for the <em>Geophysical Research Letters</em> article <em>"Demagnetization energy and internal stress in magnetite from temperature dependent hysteresis measurements"</em></strong></p> <p>MicroMag 2900/3900 Data Files (Series 0016.002) - The file name and description in the file provide the specimen information. Each file contains information on the instrument, settings, measurement, script, and the measured data: field, moment, and temperature.</p>
Persistence of the isotopic signature of pentavalent uranium in magnetite
<p>Original data pertaining to the manuscript 'Persistence of the isotopic signature of pentavalent uranium in magnetite' published in Environmental Science and Technology by Zezhen Pan, Yvonne Roebbert, Aaron Beck, Barbora Bartova, Tonya Vitova, Stefan Weyer, Rizlan Bernier-Latmani.</p> <p><a href="https://doi.org/10.1021/acs.est.1c06865">https://doi.org/10.1021/acs.est.1c06865</a></p>
Data set for: Quantifying internal stress and demagnetization effects for natural multidomain magnetite and magnetite-ilmenite intergrowths
<p>This data set contains the raw measurement data used for the manuscript "<em><strong>Quantifying internal stress and demagnetization effects for natural multidomain magnetite and magnetite-ilmenite intergrowths</strong></em>", submitted to the <em>Journal of geophysical research - Solid Earth</em>. </p> <p>The data set includes: </p> <ul> <li>MPMS_HighTemperature_SRW</li> <li>VSM_HighTemperature_SRW</li> <li>VSM_FORC</li> <li>VSM_HighTemperature_TC</li> <li>VSM_Orientation</li> <li>VSM_Preisach</li> </ul> <p>All VSM data files are in the format: MicroMag 2900/3900 Data Files (Series 0016.002). Both the VSM data files and the MPMS data files provide specimen information. Each file contains information on the instrument, settings, measurement, script, and the measured data. </p>
Datafiles for Hydrogen in magnetite from asteroid Ryugu
Open the record for dataset details and reuse information.
Data set of Magnetic stability of magnetite particles with single vortex structure during low temperature oxidation
<p>Data set of Magnetic stability of magnetite particles with single vortex structure during low temperature oxidation</p>
Data - Ultrafast generation of hidden phases \\ via energy-tuned electronic photoexcitation in magnetite
Open the record for dataset details and reuse information.
WATER VAPOR UPTAKE AND MICROWAVE HEATING OF MAGNETITE / ALUMINUM FUMARATE COMPOSITES
<p>Dataset contains original raw data used for analysis presented in the paper " WATER VAPOR UPTAKE AND MICROWAVE HEATING OF MAGNETITE / ALUMINUM FUMARATE COMPOSITES" submitted for publication. Additional data files are available from the corresponding author upon reasonable request.</p>
Estimating Paleointensities from Chemical Remanent Magnetizations of Magnetite Using Non-Heating Methods
<p>Rock magnetic and demagnetization data associated with Maurel and Gattacceca (2023) ...</p>
Pan et al. Nanoscale mechanism of UO2 formation through uranium reduction by magnetite
<p>Original data pertaining to the manuscript 'Nanoscale mechanism of UO2 formation through uranium reduction by magnetite' by Zezhen Pan, Barbora Bártova, Thomas LaGrange, Sergei M. Butorin, Neil C. Hyatt, Martin C. Stennett, Kristina O. Kvashnina and Rizlan Bernier-Latmani published in Nature Communications 2020. <a href="https://doi.org/10.1038/s41467-020-17795-0">https://doi.org/10.1038/s41467-020-17795-0</a></p>
Quantifying lattice vibrational modes in mixed magnetite-maghemite nanoparticles (dataset)
Open the record for dataset details and reuse information.
Raw data of: Changes in magnetic properties of magnetite nanoparticles upon microbial iron reduction
<p>The magnetic signals of magnetite nanoparticles (NPs) preserved in rocks, soils, and sediments are effective index for paleoenvironmental reconstruction. It has been demonstrated that magnetite NPs can serve as a terminal electron sink for the microbial respiration (i.e., microbial iron reduction). The magnetic properties of magnetite NPs may be altered by microbial iron reduction, which is a critical but often overlooked process in paleomagnetism. In this study, three magnetite NPs with different particle sizes were reduced by a dissimilatory iron-reducing bacterium (<em>Shewanella oneidensis</em> MR-1) under a non-growth condition mimicking that of the early Earth and modern oligotrophic environment. The changes in magnetic, chemical as well as crystallographic properties of the magnetite NPs during the microbial reduction process were examined. Our results showed that the bioreduction rate of magnetite NPs was mainly controlled by their particle size and redox state. In addition, the microbial iron reduction could affect both the crystallographic and magnetic properties of three types of magnetite NPs used herein. After bioreduction, the crystal lattice parameters and magnetic susceptibility of the magnetite NPs increased, while their remanence recording capability and coercivity decreased (i.e., "softer" magnetism). Furthermore, bioreduced magnetite NPs had a larger remanence loss near the Verwey transition region with low-temperature magnetic analysis. These results indicate that the microbial reduction of magnetite NPs deserves attention when sedimentary magnetites are used in paleoenvironment reconstruction.</p>
Raw data from the research on magnetite nanorods
<p>Set of data obtained using SEM, AFM, VSM and FT-IR characterization techniques, as well as additional material developed through research to meet the specific demands of the study.</p>
Application of murexide as a capping agent for fabrication of magnetite anodes for supercapacitors: experimental and DFT studies (supporting files)
<p>Supporting files.</p>
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