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Entrevista amb les editores de la revista electrònica 'Communication Papers' sobre la seva creació, 5631.mp4

Entrevista amb les editores de la revista electrònica Communication Papers sobre el que representa l'edició d'una revista digital, 5632.mp4

Entrevista amb les editores de la revista electrònica Communication Papers sobre la difusió de la revista, 5633.mp4

Entrevista amb les editores de la revista electrònica Communication Papers sobre la seva creació, l'edició digital i la difusió de la revista, 5634.mp4

The different datasets are divided in folders as follows: 1. In situ experiments. The article is based on 7 different in situ experiments: a. 400C_5mLmin_fr10; b. 400C_10mLmin_fr23; c. 400C_20mLmin_fr6; d. 400C_30mLmin_fr12; e. 300C_10mLmin_fr4; f. 350C_10mLmin_fr18; g. 500C_10mLmin_fr9. (Due to space limitations, only the data corresponding to the experiment c were uploaded to this repository. The remaining data are accessible through private communication with Cecilia Granados-Miralles, c.granados.miralles@icv.csic.es). The folder “c_400C_20mLmin_fr6” contains in situ PXRD data (time resolution=5 s) collected during reduction at the temperature and gas flow indicated in the folder name (i.e. 400C_20mLmin stands for 400 °C and 20 mL/min). The temperature indicated in the file names is the set temperature but the sample temperature is the indicated in the folder name (i.e. Tset430 led to a sample temperature of 400 °C). Heating started on the frame indicated in the folder name (i.e. fr6 stands for frame 6). This folder contains 2D-diffraction images in *.tif format, which may be opened with the Python-based program for on-the-fly data processing and exploration of two-dimensional X-ray diffraction area detector data, available for free download at http://www.clemensprescher.com/programs/dioptas., 2. Ex situ experiments: a. PXRD_Cu 1D-diffraction patterns in *.dat format. 3 space-/tab-separated columns: 2theta angle (degree), Diffracted Intensity (arbitrary units), σ (arbitrary units); b. PXRD_Co Same as previous; c. NPD_DMC 1D-diffraction patterns in *.dat format. The first line indicates: narrowest 2theta angle measured, measurement step, widest 2theta angle. The following values are the diffracted intensities recorded for each 2theta step; d. NPD_HRPT; Same as previous e. VSMHysteresis loops: Magnetic moment as a function of a variable applied field in *.dat format. Several comma-separated columns of which the relevant are the 4th, 5th, and 6th columns, which contain: Magnetic Field (Oe), Moment (emu), M. Std. Err. (emu)., During the past decade, CoFe2O4 (hard)/Co–Fe alloy (soft) magnetic nanocomposites have been routinely prepared by partial reduction of CoFe2O4 nanoparticles. Monoxide (i.e., FeO or CoO) has often been detected as a byproduct of the reduction, although it remains unclear whether the formation of this phase occurs during the reduction itself or at a later stage. Here, a novel reaction cell was designed to monitor the reduction in situ using synchrotron powder X-ray diffraction (PXRD). Sequential Rietveld refinements of the in situ data yielded time-resolved information on the sample composition and confirmed that the monoxide is generated as an intermediate phase. The macroscopic magnetic properties of samples at different reduction stages were measured by means of vibrating sample magnetometry (VSM), revealing a magnetic softening with increasing soft phase content, which was too pronounced to be exclusively explained by the introduction of soft material in the system. The elemental compositions of the constituent phases were obtained from joint Rietveld refinements of ex situ high-resolution PXRD and neutron powder diffraction (NPD) data. It was found that the alloy has a tendency to emerge in a Co-rich form, inducing a Co deficiency on the remaining spinel phase, which can explain the early softening of the magnetic material., European Comission through FP7 program, NANOPYME project, grant agreement no. 310516. European Comission through H2020 program, AMPHIBIAN Project, grant agreement no. 720853. Danish National Research Foundation through Center for Materials Crystallography, DNRF-93. Danish Center for Synchrotron and Neutron Science through DanScatt. European Comission through FP7 program, NMI3-II project, grant agreement no. 283883., Peer reviewed

The work contains 5 figures and the datasets corresponding to each figure are included in separate folders in form of .xy format or .png format. 1) The folder “Fig1” contains the “Fig1.png” which illustrates the SPS sintering conditions regarding the heating rate, dwelling time and the applied uniaxial pressure. The lower part of the figure is an illustration of the setup used at the pre/alignment of particles in an external magnetic field up to 0.55 Tesla. 2) The folder “Fig2” contains the powder X-ray data measured for different Sr/Fe molar ratios (“SrFe1I2_data.xy”, “SrFe1I4_data.xy”, “SrFe1I6_data.xy”,” SrFe1I8_data.xy) and the calculated data based on Rietveld refinement by using FullProf (“SrFe1I2_calculated.xy”, “SrFe1I4_ calculated xy”, “SrFe1I6_ calculated.xy”,” SrFe1I8_ calculated.xy”). The .xy files contain two tab delimited columns. The first column represent the 2theta diffraction angle and the second column gives the arbitrary intensities. “Figure2.png” gives the weight percentages of the different chemical phases detected in the powders while the lower part of the figure gives the crystallites sizes calculated by FullProf program. 3) The folder “Fig3” contains the magnetization data in a form of hysteresis loops measured at room temperature. Each file contains 3 columns. First column represent the applied external magnetic field (Oe units), the second column is the emu while the third column represents the emu/grams units. 4) The folder “Fig4” contains the oriented volume fraction data. Each file is a 2 columns data. The tilting angle k is given in the first column while the oriented volume fraction is given in the second column. “Fig4.png” show the pole figures obtained from x-ray diffraction measurements. 5) The folder “Fig5” gives the data repository for hysteresis loops measured at room temperature. Here the effect of external magnetic field influence prior compaction was studied. Four data sets are included here. “H_0.15T “, “H_0.45T”, “H_0.55T” and “H_0.15T_t2min. The columns are the same as described for folder “Fig3”., [EN] The magnetic properties of SrFe12O19 nanocrystallites produced by hydrothermal synthesis and consolidated by Spark Plasma Sintering (SPS) were optimized by varying the compaction parameters: sintering time, sintering temperature, uniaxial pressure or pre-compaction in a magnetic field. Highly textured compacts with a high degree of crystallite alignment were produced. Qualitative and quantitative textural information was obtained based on X-ray diffraction pole figure measurements. The optimum sintering conditions, relating the degree of alignment and bulk magnetic properties, were identified based on the resulting magnetic properties. It was found that one must strike a balance between the degree of crystallite alignment for high saturation magnetisation and coercivity (Hc) to gain the highest energy product (BHmax). It was found that the coercive field drops when the crystallite alignment increases. This was particularly pronounced in the case of magnetically pre-aligned powders prior to SPS, where Hc and BHmax decreased as the pellets became increasingly textured. The best BHmax value of 29(4) kJ m−3 was found for the sample sintered at 950 °C for 2 minutes with an applied pressure of 100 MPa for a powder pre-aligned in an applied field of 0.55 T. The results presented here show the potential of SPS consolidation of SrFe12O19 with high relative densities and emphasize the effect of the degree of alignment on the decrease of coercive field and its influence on the magnetic performance., European Commission through the Research and Innovation project AMPHIBIAN, grant agreement H2020-NMBP-2016-720853. Support is also greatly acknowledged from the Independent Research Fund Denmark project-1 (Magnetic Nanocomposites). M. C. wishes to express his gratitude towards the Carlsbergfondet for a Distinguished Associate Professor Fellowship. The Danish National Research Foundation (Center for Materials Crystallography, DNRF93) is likewise thanked for support and access to instrumental facilities. Affiliation with the Center for Integrated Materials Research (iMAT) at Aarhus University is gratefully acknowledged., Peer reviewed

Dataset description: EXPERIMENTAL DATA folder "XRD data" containes the XRD patterns of all the samples presented in the manuscript folder "Magnetic data" containes the M(H) curves of all the samples presented in the manuscript measured at room temperature in a field range of � 5 T folder "TEM data" containes the TEM images of all the samples presented in the manuscript SIMULATED DATA prb_mzfo_fig10.png Microstructures used in the micromagnetic simulations. The volume fraction of the particle phase was set to 80% in all computations. The simulation volume approximately 300 � 300 � 300 nm^3 is constant in the simulations (mesh size: 4 nm). prb_mzfo_fig11.png Applied field dependence of the quantity |M|/M_s for different average particle sizes. ASCII data file for this data set is in "prb_mzfo_absm.dat", where the first column mu0H (mT) and the following ones are |M|/M_S for 14, 26, 38, 50, 62 and 74 nm crystallites systems correspondingly. Inset: Corresponding normalized magnetization curves. ASCII data file for this data set is in "prb_mzfo_mz.dat", where the first column mu0H (mT) and the following ones are M_z/M_s for 14, 26, 38, 50, 62 and 74 nm crystallites systems correspondingly. prb_mzfo_fig12.png Particle-size-dependent evolution of the parameter |M|/M_s for each magnetic particle as a function of the applied magnetic field. ASCII data file for this data set is in "prb_mzfo_absm14nmALLstep100.dat", "prb_mzfo_absm38nmALLstep5.dat" and "prb_mzfo_absm74nmALLstep1.dat" for for 14, 38, and 74 nm crystallites systems correspondingly. The first column mu0H (mT) and the following ones are |M|/M_s for every crystallite. Snapshots of spin structures at selected fields, where the largest deviations from the uniform magnetization state are observed., [EN] We report the results of an unpolarized small-angle neutron-scattering (SANS) study on Mn-Zn ferrite (MZFO) magnetic nanoparticles with the aim to elucidate the interplay between their particle size and the magnetization configuration. We study different samples of single-crystalline MZFO nanoparticles with average diameters ranging between 8 to 80 nm, and demonstrate that the smallest particles are homogeneously magnetized. However, with increasing nanoparticle size, we observe the transition from a uniform to a nonuniform magnetization state. Field-dependent results for the correlation function confirm that the internal spin disorder is suppressed with increasing field strength. The experimental SANS data are supported by the results of micromagnetic simulations, which confirm an increasing inhomogeneity of the magnetization profile of the nanoparticle with increasing size. The results presented demonstrate the unique ability of SANS to detect even very small deviations of the magnetization state from the homogeneous one., UE, programa H2020, Proyecto AMPHIBIAN n º 720853., Dataset description: >>> EXPERIMENTAL DATA folder "XRD data" containes the XRD patterns of all the samples presented in the manuscript folder "Magnetic data" containes the M(H) curves of all the samples presented in the manuscript measured at room temperature in a field range of � 5 T folder "TEM data" containes the TEM images of all the samples presented in the manuscript >>> SIMULATED DATA prb_mzfo_fig10.png Microstructures used in the micromagnetic simulations. The volume fraction of the particle phase was set to 80% in all computations. The simulation volume approximately 300 � 300 � 300 nm^3 is constant in the simulations (mesh size: 4 nm). prb_mzfo_fig11.png Applied field dependence of the quantity |M|/M_s for different average particle sizes. ASCII data file for this data set is in "prb_mzfo_absm.dat", where the first column mu0H (mT) and the following ones are |M|/M_S for 14, 26, 38, 50, 62 and 74 nm crystallites systems correspondingly. Inset: Corresponding normalized magnetization curves. ASCII data file for this data set is in "prb_mzfo_mz.dat", where the first column mu0H (mT) and the following ones are M_z/M_s for 14, 26, 38, 50, 62 and 74 nm crystallites systems correspondingly. prb_mzfo_fig12.png Particle-size-dependent evolution of the parameter |M|/M_s for each magnetic particle as a function of the applied magnetic field. ASCII data file for this data set is in "prb_mzfo_absm14nmALLstep100.dat", "prb_mzfo_absm38nmALLstep5.dat" and "prb_mzfo_absm74nmALLstep1.dat" for for 14, 38, and 74 nm crystallites systems correspondingly. The first column mu0H (mT) and the following ones are |M|/M_s for every crystallite. Snapshots of spin structures at selected fields, where the largest deviations from the uniform magnetization state are observed., Peer reviewed

Peer reviewed

UE, programa H2020, Proyecto AMPHIBIAN n º 720853, Peer reviewed

Peer reviewed