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Magnetic textures in single crystals of Ni<sub>1-x</sub>Fe<sub>x</sub>Br<sub>2</sub>

ORAL

Abstract

Recently, frustrated systems with finite easy axis anisotropy have been proposed as a route to realize topological spin textures. In this context, Ni1-xFexBr2 has been predicted to host a field-induced skyrmion phase. This presentation will discuss the magnetic properties of Ni1-xFexBr2 single crystals and the magnetic field-temperature phase diagram. NiBr2 crystallizes in the centrosymmetric CdCl2 structure type. It exhibits a commensurate antiferromagnetic phase below TN = 48 K and an incommensurate helimagnetic phase below TIC = 22 K, both with easy plane anisotropy. The helimagnetic structure of Ni1-xFexBr2 is tuned as a function of composition and applied magnetic field, as demonstrated using bulk measurements and neutron scattering. A change in magnetic anisotropy from easy plane to easy axis is observed around x = 0.07, which is expected as a key feature to realize a skyrmion phase in this system.

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Presenters

  • Binod Rai

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory

Authors

  • Binod Rai

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory

  • Hasitha Suriya Arachchige

    Physics and Astronomy, The University of Tennessee, Department of Physics & Astronomy, University of Tennessee, Knoxville, Department of Physics, University of Tennessee, University of Tennessee, Department of Physics and Astronomy, The University of Tennessee

  • Ganesh Pokharel

    Physics, University of Tennessee, Physics and Astronomy, The University of Tennessee, Department of Physics & Astronomy, University of Tennessee, Knoxville, University of Tennessee, Department of Physics and Astronomy, The University of Tennessee, University of Tennessee, Knoxville

  • Yaohua Liu

    Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Lab, Oak Ridge National Laboratory

  • Shizeng Lin

    Theoretical Division, Los Alamos National Laboratory, Los Alamos Natl Lab, Theoretical Division, T-4, Los Alamos National Laboratory, Los Alamos National Laboratory, Theoretical Division, Los Alamos National Lab, Theoretical Division, T-4 and CNLS, Los Alamos National Laboratory, Los Alamos National Lab

  • Cristian Batista

    Physics and Astronomy, The University of Tennessee, Neutron Scattering Division and Shull-Wollan Center, Oak Ridge National Laboratory, Department of Physics and Astronomy, The University of Tennessee, University of Tennessee, Knoxville, Department of Physics and Astronomy, University of Tennessee, Knoxville, Department of Physics and Astronomy, University of Tennessee

  • David Mandrus

    Physics, University of Tennessee, Materials Science and Engineering, The University of Tennessee, Department of Materials Science & Engineering, University of Tennessee, Knoxville, The University of Tennesse, Knoxville, University of Tennessee, Department of Physics and Astronomy, University of Tennessee, Oak Ridge National Laboratory, Department of Materials Science and Engineering, University of Tennessee Knoxville, Department of Materials Science and Engineering, University of Tennessee, University of Tennessee, Knoxville, Material Science and Technology Division, Oak Ridge National Laboratory, Material Science and Technology Division, Oak Ridge National Lab

  • Andrew D Christianson

    Materials Science & Technology Division, Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge National Lab, Materials Science and Technology Division, Oak Ridge National Lab, Materials Science and Technology Division, OakRidge National Laboratory

  • Andrew May

    Materials Science and Technology Division, Oak Ridge National Laboratory, Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge National Lab