Table 1 Ewald parameter symbols and the corresponding Ewald parameter values given by Eq. (10).

From: Periodicity staircase in a centrosymmetric Fe/Gd magnetic thin film system

Ewald parameter symbol

Ewald parameter value

Π1

2.00

Π2

1.72

Π3

1.32

Π4

0.85

Π5

0.38

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