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- W2317864114 abstract "In order to get to the bottom of substitution effects reported in CuCrO${}_{2}$ delafossite, structural, magnetic, and electric properties of several CuCr${}_{1ensuremath{-}x}$M${}_{x}$O${}_{2}$ series, where M${}^{3+}$ is a $S$ $=$ 0 cation (M${}^{3+}$ $=$ Al${}^{3+}$, Ga${}^{3+}$, Sc${}^{3+}$, Rh${}^{3+}$), have been investigated. It is shown that the homogeneity of the substitution is element dependent and is particularly difficult to achieve for the smallest Al${}^{3+}$ cation. Ferroelectricity and dielectric properties are found to depend on the $x$ value, but also on the nature of M: The largest substitution effects are observed for the larger elements, owing to the decrease of the Cr${}^{3+}$-Cr${}^{3+}$ interaction resulting from the enlargement of the in-plane lattice parameter. However, the magnetic structures of CuCr${}_{0.9}$Ga${}_{0.1}$O${}_{2}$ and CuCr${}_{0.9}$Rh${}_{0.1}$O${}_{2}$, revealed close to that of CuCrO${}_{2}$ by neutron diffraction, demonstrate the great stability of this antiferromagnetic incommensurate structure against the presence of {M${}^{3+}$, $S$ $=$ 0} cations. This emphasizes the very different nature of the magnetic ground state of CuCrO${}_{2}$, as compared to CuFeO${}_{2}$, despite their common structural characteristics." @default.
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- W2317864114 date "2012-08-21" @default.
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- W2317864114 title "Magnetic dilution and steric effects in the multiferroic delafossite CuCrO<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>" @default.
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- W2317864114 doi "https://doi.org/10.1103/physrevb.86.054437" @default.
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