Table 2. Comparison of Properties of L1₀ FeNi in the Literature.

s. no.	processing technique	composition (atom %)	vol. % of L10 FeNi	long-range ordering parameter (s)	FeNi particles’ shape and size	magnetic saturation (Ms) (emu/g)	hysteresis (Hc) Oe	ref
1	natural meteorite (NWA 6259)	44% Ni, 54% Fe, trace impurity of Co, Cu, P	95		1 μm thick ring along grain boundary of FCC FeNi	143.7	1000	(39,40)
2	neutron irradiation of the FeNi single crystal	50% Ni, 50% Fe		0.41–0.45				(11,15)
3	cyclic oxidation and reduction of Ni-coated Fe	50% Ni, 50% Fe	19					(41)
4	deposition of the monatomic layer of Fe and Ni using molecular beam epitaxy	50% Ni, 50% Fe		0.2–0.6		140–180	1000–1350	(42−49)
5	nitrogen insertion and topotactic extraction	50% Ni, 50% Fe	100	0.71	90 nm (powder)	144	1784.42	(14)
6	crystallization from amorphous FeNiSiBPCu bulk metallic glass	42% Fe, 41.3% Ni, 8% Si 4% B, 4% P and 0.7% Cu	8	0.8	30–50 nm sized polycrystalline grains	100	700	(36,50)
7	crystallization from amorphous FeNiPC bulk metallic glass	40% Fe, 40% Ni, 13% P and 7% C			<100 nm dispersed in bulk	82	641	(13)
8	high-pressure torsion of meteorite (Morasko Meteorite)	51% Fe and 49% Ni				108–150	30–80	(38)
9	high-pressure torsion of FeNi and heat treatment	50% Fe, 50% Ni	absent			144.7	3.8	(51)
10	laser melting of FeNi alloyed powder	50% Fe, 50% Ni	9.5			144	50	this work