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The magnetic structure of cubic MnGe has been determined by powder neutron diffraction. MnGe has a helical spin structure with a propagation vector k=(0,0,ζ), where ζ=0.107(5) just below the transition temperature TN=170 K. The ζ value increases upon cooling and locks in to the value of 0.167(4) below 30 K. The moment value is 2.3(5)μB at 2 K. The onset of the magnetic order is connected with a symmetry lowering from cubic to orthorhombic.
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Makarova et al. (2012) studied this question.
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