Simulations of Bond Percolation and Synthesis of Bulk Polycrystalline Rare-Earth Nickelates La<sub>1-x</sub>R<sub>x</sub>NiO<sub>3</sub> (R = Y, Nd, Sm; x = 0-1)

ORAL

Abstract

We report high resolution x-ray diffraction, electrical resistivity, AC and DC magnetic susceptibility, measurement on high purity bulk polycrystalline La1-xRx NiO3 (R= Y, Nd, Sm; x= 0–1). Sol-Gel synthesis routes followed by high pressure (200-230 Bar) and high temperature (800-900°C) under an oxygen atmosphere. This carefully controlled approach ensures the maintenance of small particle sizes and enhances the overall purity of the resulting samples. Furthermore, we incorporate bond-percolation simulations that employ theoretical models to reveal that the metal-insulator transition occurs at a (universal) rare-earth concentration of approximately xc = 0.3575...

*We acknolwedge support form The University of Texas, College of Natural Sciences Freshman Research InitiativeThis research used beamline 28ID-2 (XPD) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704.

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Presenters

  • Angel A Martinez

    • University of Texas at Austin

Authors

  • Angel A Martinez

    • University of Texas at Austin

  • Andrew H Yang

    • University of Texas at Austin

  • Eric Liang

    • University of Texas at Austin

  • John T Markert

    • University of Texas at Austin