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Evolution of phases in (Ba,Sr)Al4

ORAL

Abstract

Recent results have shown an emergence of CDW order in SrAl4 at 243K, together with a hysteretic structural transition at 87K from a tetragonal to potentially monoclinic structure. The tetragonal structure of BaAl4 with lattice parameters very close to SrAl4 invites a chemical substitution study to track the reported transitions. We have performed electrical resistivity and magnetic susceptibility measurements, along with x-ray and neutron scattering on the Ba1-xSrxAl4 family. All samples have been grown in self-flux and produce large single-crystals, seemingly limited by crucible size.

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Presenters

  • Danila Sokratov

    Quantum Materials Center, University of Maryland, College Park

Authors

  • Danila Sokratov

    Quantum Materials Center, University of Maryland, College Park

  • Prathum Saraf

    Quantum Materials Center, Department of Physics, University of Maryland College Park, Quantum Materials Center, University of Maryland, College Park, University of Maryland, College Park

  • Chris Eckberg

    Quantum Materials Center, University of Maryland, College Park, University of Maryland, College Park

  • Daniel J Campbell

    Quantum Materials Center, University of Maryland, College Park, University of Maryland, College Park

  • Jeffrey W Lynn

    Center for Neutron Research, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, Quantum Materials Center, University of Maryland, College Park, NIST Center for Neutron Research, National Institute of Standards and Technology

  • Peter Zavalij

    Chemistry, University of Maryland, College Park

  • Johnpierre Paglione

    University of Maryland, College Park, Maryland Quantum Materials Center, Department of Physics, University of Maryland, Quantum Materials Center, Department of Physics, University of Maryland College Park, Quantum Materials Center, University of Maryland, College Park, Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park, University of Maryland