Table 1 Spin arrangements of the Fe i ions with \(\overrightarrow{k}=0\). First four columns give relative spin orderings of Fe i spins. The last column gives the irreducible representations (IR) according to which the components x, y, and z of the order parameters transform, respectively.
Fe1 | Fe2 | Fe3 | Fe4 | Order parameter | IR’s |
|---|---|---|---|---|---|
+ | + | + | + | \(\overrightarrow{F}\) | Γ2+, Γ3+, Γ4+ |
+ | − | + | − | \(\overrightarrow{G}\) | Γ1−, Γ4−, Γ3− |
+ | + | − | − | \(\overrightarrow{C}\) | Γ3+, Γ2+, Γ1+ |
+ | − | − | + | \(\overrightarrow{A}\) | Γ4−, Γ1−, Γ2− |
