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• W2891634967 abstract "We report a neutron powder diffraction study of $R{mathrm{Mn}}_{7}{mathrm{O}}_{12}$ quadruple perovskite manganites with $R=mathrm{La}$, Ce, Nd, Sm, and Eu. We show that in all measured compounds concomitant magnetic ordering of the $A$ and $B$ manganese sublattices occurs on cooling below the N'eel temperature. The respective magnetic structures are collinear, with one uncompensated ${mathrm{Mn}}^{3+}$ moment per formula unit as observed in bulk magnetization measurements. We show that both ${mathrm{LaMn}}_{7}{mathrm{O}}_{12}$ and ${mathrm{NdMn}}_{7}{mathrm{O}}_{12}$ undergo a second magnetic phase transition at low temperature, which introduces a canting of the $B$-site sublattice moments that is commensurate in ${mathrm{LaMn}}_{7}{mathrm{O}}_{12}$ and incommensurate in ${mathrm{NdMn}}_{7}{mathrm{O}}_{12}$. This spin canting is consistent with a magnetic instability originating in the $B$-site orbital order. Furthermore, ${mathrm{NdMn}}_{7}{mathrm{O}}_{12}$ displays a third magnetic phase transition at which long-range ordering of the Nd sublattice modifies the periodicity of the incommensurate spin canting. Our results demonstrate a rich interplay between transition-metal magnetism, orbital order, and the crystal lattice, which may be fine-tuned by cation substitution and rare-earth magnetism." @default.
• W2891634967 created "2018-09-27" @default.
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• W2891634967 date "2018-09-19" @default.
• W2891634967 modified "2023-10-17" @default.
• W2891634967 title "Magnetic structures of the rare-earth quadruple perovskite manganites <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>R</mml:mi><mml:msub><mml:mi>Mn</mml:mi><mml:mn>7</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>12</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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• W2891634967 doi "https://doi.org/10.1103/physrevb.98.104423" @default.
• W2891634967 hasPublicationYear "2018" @default.
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