open access publication

Article, 2024

Making a Hedgehog Spin-Vortex State Possible: Geometric Frustration on a Square Lattice

Chemistry of Materials, ISSN 1520-5002, 0897-4756, Volume 36, 8, Pages 3546-3554, 10.1021/acs.chemmater.3c02170

Contributors

Siebeneichler, Stefanie 0000-0002-8543-0581 [1] Ovchinnikov, Alexander V 0000-0002-0537-4234 [1] Sheptyakov, Denis V 0000-0002-3001-6586 [2] Mudring, Anja-Verena 0000-0002-2800-1684 (Corresponding author) [1] [3] [4]

Affiliations

  1. [1] Stockholm University
    2. [NORA names: Sweden; Europe, EU; Nordic; OECD];
  2. [2] Paul Scherrer Institute
    3. [NORA names: Switzerland; Europe, Non-EU; OECD];
  3. [3] Aarhus University
    4. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD];
  4. [4] Umeå University
    5. [NORA names: Sweden; Europe, EU; Nordic; OECD]

Abstract

Magnetic materials with noncollinear spin arrangements are of considerable interest owing to their potential use in emerging computational technologies and memory devices. Competing magnetic interactions, i.e., magnetic frustration, are one of the main origins of noncollinear magnetic structures. While frustrated systems have been mainly studied among magnetic insulators, combining magnetic frustration with electrical conductivity can allow simultaneous charge and spin manipulation, which is crucial for the design of electronic devices. Here, we present a new intermetallic solid solution LaMn2–x Au4+x , whose crystal structure accommodates magnetically frustrated Mn square nets. Powder neutron diffraction and first-principles analysis provide evidence that the metallic LaMn2–x Au4+x phase can host the frustration-driven hedgehog spin-vortex crystala rare noncollinear magnetic state, which was previously exclusively observed for iron pnictides.

Keywords

analysis, arrangement, charge, computer technology, conductivity, crystal, crystal structure, design, design of electronic devices, devices, diffraction, electrical conductivity, electronic devices, evidence, first-principles analysis, frustration, geometrical frustration, hedgehog, i., insulation, interaction, iron, iron pnictides, lattice, magnetic frustration, magnetic insulators, magnetic interactions, magnetic materials, magnetic state, magnetic structure, manipulation, materials, memory, memory devices, nets, neutron diffraction, noncollinear magnetic state, noncollinear magnetic structure, noncollinear spin arrangement, origin, phase, pnictides, possibilities, potential use, powder, powder neutron diffraction, simultaneous charging, spin arrangement, spin manipulation, square, square lattice, square net, state, structure, system, technology, use

Funders

  • Danish Agency for Science and Higher Education
  • Swedish Foundation for Strategic Research

Data Provider: Digital Science

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