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• W2000928894 abstract "The zero-field magnetic structure of ${mathrm{Ce}}^{11}{mathrm{B}}_{6}$ has been revised from neutron powder and single-crystal diffraction including neutron spherical polarimetry. The crystal structure remains cubic in the antiferroquadrupolar (AFQ) ordered state ${(T}_{Q}=3.3mathrm{K},$ ${mathbf{k}}_{Q}=[1/2,1/2,1/2])$ and in the antiferromagnetic (AFM) ordered state ${(T}_{N}=2.3mathrm{K},$ ${mathbf{k}}_{1}=[1/4,1/4,0],$ ${mathbf{k}}_{2}=[1/4,ensuremath{-}1/4,0],$ ${mathbf{k}}_{1}^{ensuremath{'}}=[1/4,1/4,1/2],$ ${mathbf{k}}_{2}^{ensuremath{'}}=[1/4,ensuremath{-}1/4,1/2])$ within the precision of the experiment. The model of Effantin et al. [J. Magn. Magn. Mater. 47-48, 145 (1985)] fits our 60-mK high-intensity neutron powder diffraction data rather poorly and therefore a model of the AFM multi-$mathbf{k}$ structure has been developed. It is a 2 ${mathbf{k}mathbf{ensuremath{-}}mathbf{k}}^{ensuremath{'}}$ transverse sine-wave structure with the Ce magnetic moments strictly along $[1ensuremath{-}10]$ and [110] and orthogonal arrangement of the nearest moments. Ce atoms located at the $z=0$ and $z=1$ layers have significantly different magnetic moment values. In addition there is a modulation of the moment value in each layer. The resulting ordered magnetic Ce moments reach $0.744(16){ensuremath{mu}}_{B},$ $0.543(16){ensuremath{mu}}_{B}$ at $z=1$ and only $0.01{ensuremath{mu}}_{B},$ $0.138(7){ensuremath{mu}}_{B}$ at $z=0$ at 60 mK. This complex AFM structure is due to competition between the established AFQ order and the dipolar and octupolar AFM order developing at lower temperatures. The model is consistent with the $ensuremath{mu}mathrm{SR}$ zero-field results [R. Feyerherm et al., J. Magn. Magn. Mater. 140-144, 1175 (1995)] and suggests a highly inhomogeneous conduction electron spin polarization and anisotropic RKKY interactions below ${T}_{N}.$" @default.
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• W2000928894 date "2003-12-01" @default.
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• W2000928894 title "Zero-field magnetic structure in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>CeB</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>reinvestigated by neutron diffraction and muon spin relaxation" @default.
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• W2000928894 doi "https://doi.org/10.1103/physrevb.68.214401" @default.
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