MAGNDATA Collection of Magnetic Structures

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Sr2CoO2Ag2Se2 (#2.23) 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
• ISODISTORT and TOPAS employed
• Atomic positions and unit cell from an experiment at 298K.
• The setting used to describe the spin arrangement in the original reference is inconsistent with the figure in the article. We have corrected interchanging the spin components guided by the figure in the article.
• The spin arrangement is not described in the standard setting of the reported MSG. An origin shift is required.
• A fully equivalent arrangement corresponding to a domain related structure is obtained by switching the direction of the moments of the layer at z=1/2. The symmetry of this equivalent structure is given by the same MSG, but in this case in its standard setting.
• A similar structure reported for Ba2CoO2Ag2Se2 (see entry #2.24)

• 2k magnetic structure
• Two irreps active as primary
• The fact that the reported model is a multi-k structure is not mentioned in the original report
• A collinear model (probably 1k structure) is reported to fit equally well the experimental data.
• The authors have chosen the tetragonal model (implying a multi-k arrangement) because of its higher symmetry.