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000278944 1001_ $$0P:(DE-HGF)0$$aNair, Harikrishnan S.$$b0$$eCorresponding author
000278944 245__ $$aSpin-lattice coupling and frustrated magnetism in Fe-doped hexagonal LuMnO 3
000278944 260__ $$aLes-Ulis$$bEDP Science65224$$c2015
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000278944 520__ $$aStrong spin-lattice coupling and prominent frustration effects observed in the 50% Fe-doped frustrated hexagonal $(h)\text{LuMnO}_3$ are reported. A Néel transition at $T_{\mathrm{N}}\approx112\ \text{K}$ and a possible spin re-orientation transition at $T_{\mathrm{SR}}\approx55\ \text{K}$ are observed in the magnetization data. From neutron powder diffraction data, the nuclear structure at and below 300 K was refined in polar P63cm space group. While the magnetic structure of LuMnO3 belongs to the $\Gamma_4\ (P6'_3c'm)$ representation, that of LuFe0.5Mn0.5O3 belongs to $\Gamma_1\ (P6_3cm)$ which is supported by the strong intensity for the (100) reflection and also judging by the presence of spin-lattice coupling. The refined atomic positions for Lu and Mn/Fe indicate significant atomic displacements at $T_{\mathrm{N}}$ and $T_{\mathrm{SR}}$ which confirms strong spin-lattice coupling. Our results complement the discovery of room temperature multiferroicity in thin films of $h\text{LuFeO}_3$ and would give impetus to study LuFe1−x Mn x O3 systems as potential multiferroics where electric polarization is linked to giant atomic displacements.
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000278944 7001_ $$0P:(DE-Juel1)130647$$aFu, Zhendong$$b1
000278944 7001_ $$0P:(DE-HGF)0$$aKumar, C. M. N.$$b2
000278944 7001_ $$0P:(DE-HGF)0$$aPomjakushin, V. Y.$$b3
000278944 7001_ $$0P:(DE-Juel1)131047$$aXiao, Yinguo$$b4
000278944 7001_ $$0P:(DE-HGF)0$$aChatterji, Tapan$$b5
000278944 7001_ $$0P:(DE-HGF)0$$aStrydom, André M.$$b6
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