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Magnetic structures of PrMn7O12: Intersublattice magnetoelastic coupling and incommensurate spin canting
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We report the magnetic structures of PrMn7O12, resolving both a high temperature structure in common with the other ๐ 3+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 AโฒB-exchange is primarily responsible for the ferrimagnetic structures observed across the ๐ 3+Mn7O12 family. Finally, an analytical mean-field `minimal modelโ 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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- 16/10/2024
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PhysRevB.110.134426-PrMn7O12-neutron.pdf | 2.06 MB | MDR Open |
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