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Through a combination of magnetic susceptibility, specific heat, and neutron powder diffraction measurements we have revealed a sequence of four magnetic phase transitions in the columnar quadruple perovskite Er2CuMnMn4O12. A key feature of the quadruple perovskite structural framework is the complex interplay of multiple magnetic sublattices via frustrated exchange topologies and competing magnetic anisotropies. It is shown that in Er2CuMnMn4O12, this phenomenology gives rise to multiple spin-reorientation transitions driven by the competition of easy-axis single ion anisotropy and the Dzyaloshinskii–Moriya interaction; both within the manganese B-site sublattice. At low temperature, one Er sublattice orders due to a finite f-d exchange field aligned parallel to its Ising axis, while the other Er sublattice remains non-magnetic until a final, symmetry-breaking phase transition into the ground state. This nontrivial low-temperature interplay of transition metal and rare-earth sublattices, as well as an observed k = (0, 0, 1 2) periodicity in both manganese spin canting and Er ordering, raises future challenges to develop a complete understanding of the R2CuMnMn4O12 family.

権利情報:

• In Copyright
  

キーワード: A-site columnar-ordered perovskites, neutron diffraction, magnetic structures, ferrimagnets, spin-reorientation transitions

刊行年月日: 2024-12-01

出版者: International Union of Crystallography (IUCr)

掲載誌:

• Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials (ISSN: 20525206) vol. 80 issue. 6 p. 656-664

研究助成金:

• Coordenação de Aperfeiçoamento de Pessoal de Nível Superior PDSE - 88881.846711/2023-01

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5117

公開URL: https://doi.org/10.1107/s2052520624008965

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更新時刻: 2024-12-09 16:30:40 +0900

MDRでの公開時刻: 2024-12-09 16:30:41 +0900