Magnetic structures of <math>
  <mrow>
    <msub>
      <mi>PrMn</mi>
      <mn>7</mn>
    </msub>
    <msub>
      <mi>O</mi>
      <mn>12</mn>
    </msub>
  </mrow>
</math>: Intersublattice magnetoelastic coupling and incommensurate spin canting

Dylan Behr; LIU Ran; YAMAURA Kazunari; BELIK Alexei; Dmitry D. Khalyavin; Roger D. Johnson

doi:10.1103/physrevb.110.134426

Article Magnetic structures of

{PrMn}_{7} O_{12}

: Intersublattice magnetoelastic coupling and incommensurate spin canting

Dylan Behr ; LIU Ran (National Institute for Materials Science) ; YAMAURA Kazunari (National Institute for Materials Science) ; BELIK Alexei (National Institute for Materials Science) ; Dmitry D. Khalyavin ; Roger D. Johnson

PhysRevB.110.134426-PrMn7O12-neutron.pdf

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Dylan Behr, LIU Ran, YAMAURA Kazunari, BELIK Alexei, Dmitry D. Khalyavin, Roger D. Johnson. Magnetic structures of

{PrMn}_{7} O_{12}

: Intersublattice magnetoelastic coupling and incommensurate spin canting. Physical Review B. 2024, 110 (13), 134426. https://doi.org/10.1103/physrevb.110.134426

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(abstract)

We report the magnetic structures of PrMn7O12, resolving both a high temperature structure in common with the other 𝑅3+Mn7O12 systems, and an additional low temperature phase characterised by a superposed incommensurate spin canting. A phenomenological model is developed to account for large magneto-elastic coupling immediately below the Curie temperature, demonstrating that A′B-exchange is primarily responsible for the ferrimagnetic structures observed across the 𝑅3+Mn7O12 family. Finally, an analytical mean-field `minimal model’ is presented that successfully accounts for all magnetic structures observed in this family of materials, including the canted commensurate and incommensurate ground states.

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