DOI: 10.5061/dryad.hhmgqnkst
title: Data from: Interplay of crystal structure and magnetic properties of the Eu5.08-xSrxAl3Sb6 solid solution

description: Zintl phases containing rare earth metals have gained attention due to
 their magnetic, electronic, and thermoelectric properties. Eu5.08Al3Sb6 is
 a new structure type (monoclinic space group C2/m) that can be described
 as a pseudo-rock-salt EuSb motif with the Eu-centered Sb octahedra at the
 origin of the unit cell, and on the C-face-center, containing either Eu
 (8%) or an Al4 tetrahedron modeled as a dual tetrahedron (37.5 %). The
 complete solid solution of Eu5.08-xSrxAl3Sb6 can be prepared; however, the
 cation totals vacillate from 5 to 5.24 depending on the Al content. Al
 K-edge XANES shows a shift to higher energy relative to Al metal, but at
 slightly lower energy relative to AlSb, indicating an intermediate
 oxidation state closer to +3 than 0. The lack of an Al K-edge shift with
 the incorporation of Sr suggests that changes in Sr content do not have a
 meaningful impact on the electronics of the Al tetrahedra. Investigation
 of the solid solution structures provides evidence for classifying this
 structure type as a polar intermetallic phase with variable composition.
 Magnetization measurements were collected for the solid solution and show
 complex magnetic ordering with competing ferromagnetic and
 antiferromagnetic interactions as the Sr content increases.
description: Al K-edge x-ray Absorption Near-Edge Structure (XANES) spectra
 were acquired on single crystals using a scanning transmission x-ray
 microscope (STXM) in a ~ 0.5 atm He-filled chamber. Spectra were recorded
 in topoff mode at 220 mA at the spectromicroscopy (SM) beamline 10-ID1 at
 the Canadian Light Source (CLS) and 500 mA at the Molecular Environmental
 Science (MES) beamline 11.0.2 at the Advanced Light Source (ALS). The
 photon energy of the medium-energy diffraction grating was calibrated to
 the Al K-edge for a 1000 Å aluminum filter sample (Luxel, inflection point
 = 1559.0 eV). The maximum energy resolution E/ΔE was previously determined
 at better than 7500, consistent with the observed standard deviation for
 spectral transitions of ±0.3 eV determined from comparing spectral
 features over multiple particles and beam runs. Edge shifts for
 Eu<sub>5.08</sub>Al<sub>3</sub>Sb<sub>6</sub> and AlSb were determined from the half-height of the Al K absorption edge at 1559 eV and could be referenced to the half-height of the 1000 Å aluminum filter sample: Eu<sub>5.08</sub>Al<sub>3</sub>Sb<sub>6, </sub>1560.4 eV; AlSb, 1560.7 eV. Temperature and field-dependent measurements of single crystal samples were performed using a Physical Property Measurement System (PPMS) Dynacool manufactured by Quantum Design Inc. Temperature-dependent magnetization was measured from 1.8 to 300 K with applied fields from 100 Oe to 3000 Oe. Field-dependent magnetization was collected at temperatures from 1.8 to 300 K with a magnetic field up to 9 T.
description: # Data from: Interplay of crystal structure and magnetic properties of the
 Eu5.08-xSrxAl3Sb6 solid solution
 [https://doi.org/10.5061/dryad.hhmgqnkst](https://doi.org/10.5061/dryad.hhmgqnkst) ## Description of the data and file structure Aluminum K-edge x-ray absorption near-edge structure (XANES) spectroscopy was used to evaluate the nominal Al charge in Eu5.08Al3Sb6, Eu1.75Sr3.28Al3Sb6, and Sr5.03Al3Sb6. Sample identification: Al, AlSb Eu5.08Al3Sb6, Sr5.03Al3Sb6, and Eu1.75Sr3.28Al3Sb6. There is a space between each dataset. The data are provided in two columns, below a header containing the sample name. Column 1 is in eV, and column 2 is in intensity. Temperature- and field-dependent magnetization were measured for Eu5-xSrxAl3Sb6 crystals, x = 0.30, 1.37, 2.44, 4.00, 4.87 and 5.03. Each data file includes columns for both sample-specific measurements and instrument diagnostics recorded throughout the experiment. The key sample data columns are labeled Temperature (K), Magnetic Field (Oe), and DC Moment (emu), corresponding to the measurement temperature, applied magnetic field, and magnetic moment of the sample, respectively. Temperature-dependent susceptibility was measured for various applied fields, including the low-temperature region for Eu5-*x*Sr*x*Al3Sb6 crystals, *x* = 1.37, 2.44, 3.12, 4.00 4.87. Each data file contains both temperature and field-dependent measurements, with the temperature-dependent data always appearing first, followed directly by the field-dependent data. ### Files and variables #### File: AlKedge\_spectra.txt **Description:** Al K edge absorption near-edge structure spectra versus energy ##### Variables * Energy in eV * Sample_Intensity #### File: Eu5-xSrxAl3Sb6\_magnetism.zip **Description:** Temperature dependent magnetization, field dependent magnetization, low temperature magnetization as a function of field for samples: x = 0.30, 1.37, 2.44, 3.12, 4.00, 4.87, 5.03 **Variables** Temperature/ K, Magnetic Field/ Oe , AC moment / emu, AC standard deviation/ emu, AC phase/ degree, AC phase standard deviation/ degree, AC susceptibility/ emu/Oe, AC susceptibility Standard deviation/ emu/Oe, AC chi'/ emu.Oe, AC chi"/ emu/Oe. AC chi' standard deviation/ emu/Oe, AC chi" standard deviation/ emu/Oe, AC drive / Oe, AC Frequence / Hz, DC moment/ emu, DC standard error/ emu, DC quadrapole moment/ emu, Range/ mV