Table 1 Structure and magnetic parameters in 2D FenGeTe2 (4 ≤ n ≤ 7).

From: Layer-dependent magnetic phase diagram in FenGeTe2 (3 ≤ n ≤ 7) ultrathin films

 

x

Thickness

Eform

M

MAE

TC

Exchange parameter (meV)

(Å)

(eV/atom)

(μB)

(meV)

(K)

J1

J2

J3

Fe3GeTe2

0.5

8.61

−0.08

2.87

2.83

138

−0.44

3.27

0.47

Fe4GeTe2

1.0

9.10

−0.03

2.73

−5.01

68

7.40

10.50

0.10

Fe5GeTe2

0

10.95

−0.11

3.18

4.53

320

−0.20

4.70

−2.60

Fe6GeTe2

0.2

11.03

−0.05

2.94

6.31

450

6.60

−8.60

21.20

Fe7GeTe2

0.75

12.21

−0.01

2.91

3.91

570

−29.40

23.00

27.50

  1. Fe2+/Fe3+ ratio x, effective thickness, formation energy Eform, magnetic moment M per Fe atom, magnetic anisotropy energy (MAE) per unit cell, Curie temperature TC, and exchange parameters J1, J2, and J3 of FenGeTe2 multilayer films.
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