MAGNDATA Collection of Magnetic Structures

Log in

CsFe(MoO4)2 (#1.499) 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
• Above 220K, the system has P-3m symmetry
• Not mentioned in the article, but probably the used NPD data is unsensitive to the absolute global orientation of spin configuration on the xy plane (the MSG does not depend on it), and the orientation described in the article is just an arbitrary choice.
• A collinear model with 1/3 of the Fe sites having null moments that equally fits the data is also described in the supplementary material of the article. This alternative model is also associated with the same primary irrep mH2H3, but for a different direction within the 4-dim (physically irreducible) irrep. Its MSG is P_S-1 (a-b,a+2b,2c;0,1/2,1/2).

• 1k magnetic structure
• k-maximal magnetic symmetry
• 4 dimensional irrep along a special direction as primary
• The non-zero z moment component allowed by the MSG, which is zero in the model, corresponds to the secondary irrep mA1+ with wave vector (0 0 1/2). This component takes into account a possible induced secondary magnetic degree of freedom, which can become spontaneous through coupling with the primary order parameter and can be considered a third harmonic of the modulation.
• The MSG is polar along c, while the paramagnetic phase is non-polar. This allows magnetically induced ferroelectricity along c (type II multiferroic).