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- W2078068845 abstract "A frustrated spinel $mathrm{Cd}{mathrm{Cr}}_{2}{mathrm{O}}_{4}$ undergoes a three-dimensional spin-Peierls transition at ${T}_{N}=7.8phantom{rule{0.3em}{0ex}}mathrm{K}$ from a cubic paramagnetic to a tetragonal N'eel state. The N'eel state has a spiral magnetic structure with a characteristic wave vector of (0, $ensuremath{delta}$, 1) when the $c$ axis is elongated [J.-H. Chung et al., Phys. Rev. Lett. 95, 247204 (2005)]. Here, we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the $ac$ plane perpendicular to the direction of the spiral modulation. We also find that the spiral structure in the $ac$ plane is elliptical with the $c$ component larger by $ensuremath{sim}24%$ than the $a$ component, suggesting a strong coupling between the magnetic structure and the structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic-field dependence suggests the existence of magnetic anisotropy in the N'eel state, which is consistent with our previous inelastic studies [J.-H. Chung et al., Phys. Rev. Lett. 95, 247204 (2005)]." @default.
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- W2078068845 date "2007-03-20" @default.
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- W2078068845 title "Spiral spin structure in the Heisenberg pyrochlore magnet<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Cd</mml:mi><mml:msub><mml:mi mathvariant=normal>Cr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W2078068845 doi "https://doi.org/10.1103/physrevb.75.104415" @default.
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