MAGNDATA Collection of Magnetic Structures

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Fe4O5 (#0.1000) view in Jmol Download mcif file Download vesta file (all atoms) Download vesta file (magnetic atoms only)

Magnetic structure with all atoms

Magnetic structure with only magnetic atoms

• NPD
• Position structure from a determination at 295K
• Polar symmetry along c.
• FM on the plane ab
• Ferrimagnetic along a
• The authors do not seem aware that they are proposing a magnetic structure, which breaks centrosymmetry and has a polar MSG.
• The magnitude of moment components has been estimated from a figure in the article.
• The transition at 150K introduces an incommensurate structural modulation, which is not included in the present model

• 1k magnetic structure
• Three irreps involved. This means that three different order parameters are present. mGM3- is associated with the spin arrangement of Fe1 and Fe3 along z, while mGM4+ corresponds to the Fe2 ordering along, while mGM3+ is for the ferrimagnetic component along a.
• The transition at 150K introduces the non-zero ferrimagnetic component along a, corresponding to the irrep mGM3+.
• The authors do not mention the method employed to arrive to this model, and the fact that the proposed spin arrangement requires three irreps is not mentioned. Not clear if more simple models with two irreps were checked.