Table 1.

Classical energy of ferromagnetic state with respect to zigzag state for representative model parameters (all energies in meV).

Models	K	J	Γ	${\mathrm{\Gamma }}^{\prime }$	J3	EFM−EZZ
This work	−5	−3	2.5	0.1	0.75	−0.12
Winter et al.20	−5	−0.5	2.5	0	0.5	0.37
Sears et al.53	−10	−1.5	8.8	0	0.4	0.50