Evolution of Magnetism in Sr$_{2-x}$La$_{x}$FeO$_{4 }$ system of compounds at low temperature

ORAL

Abstract

We report on the evolution of magnetism at low temperature in two compounds of the Sr$_{2-x}$La$_{x}$FeO$_{4}$ system. Our studies confirmed the room temperature structures of both the compounds that crystallize in the tetragonal K$_{2}$NiF$_{4}$ structure with I4/mmm space group. Both the compounds have antiferromagnetic ordering temperatures above 100K. Low temperature neutron diffraction were taken on the Single Crystal Diffractometer at Los Alamos Neutron Science Center and Intensed Pulsed Neutron Source(IPNS) to gain more insight into the evolution of magnetism below 30K and the nature of transitions evidenced in the previous studies.

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Authors

  • Karunakar Kothapalli

    New Mexico State University

  • Abdel Alsmadi

    The Hashemite University

  • Shufang Su

    Iowa State University, Los Alamos National Laboratory, Lawrence Livermore National Laboratory, University of Arizona, Sandia National Laboratories, Physics Department, Texas Tech University, Lubbock, TX 79409-1051, Northwestern University, Texas Tech University, University of Utah Department of Physics, University of Toulouse-UPS, IRSAMC, Toulouse, France, University of Arizona, Department of Physics, National Institute of Advanced Industrial Science and Technology, Texas A\&M University, Midwest Proton Radiotherapy Institute, Birdville ISD, Universidad de Colima, Universidad de Buenos Aires, Brigham Young University, UT Atlington, MV Systems, Colorado State University, St. Petersburg Electrotechnical University, New Mexico State University, Texas State Univ., CAMD/LSU, Texas Christian University, Fort Worth, TX, North Side High School, Fort Worth, TX, Nitronex Corporation, Arizona State University, Angelo State University Department of Physics, Texas Tech University Deptarment of Electrical Engineering

  • Heinz Nakotte

    New Mexico State University