Table 1 Quantities measured from experiment and estimated from thermal fluctuations for FM, SAF and a FM–SAF junction

From: Local and global energy barriers for chiral domain walls in synthetic antiferromagnet–ferromagnet lateral junctions

Quantities

FM

SAF

FM–SAF junction

Jth,therm (T = 300 K) (×106 A cm−2)

8.8 ± 1.6 (10 ms)

9.4 ± 1.2 (10 ms)

38 ± 1.1 (10 ms)

Jth,therm (T = 400 K) (×106 A cm−2)

1.5 ± 0.4 (10 ms)

5.1 ± 1.1 (10 ms)

43 ± 0.8 (10 ms)

EJ/kBT (T = 300 K)

29 ± 11.2

32 ± 4.2

100 ± 10.7

EJ/kBT (T = 400 K)

22 ± 2.3

24 ± 4.2

172 ± 43.4

EJ (T = 300 K) (eV)

0.73 ± 0.3

0.8 ± 0.11

2.5 ± 0.27

EJ (T = 400 K) (eV)

0.73 ± 0.08

0.79 ± 0.14

5.8 ± 1.44

δEJ (eV)

0 ± 0.31

−0.01 ± 0.18

3.3 ± 1.47

\(H_{\mathrm{{fl}}}^ +\) (T = 300 K) (Oe)

177

791

791 (SAF region)

\(H_{\mathrm{{fl}}}^ -\) (T = 300 K) (Oe)

−177

−791

−177 (FM region)

\(H_{\mathrm{{fl}}}^ +\) (T = 400 K) (Oe)

204

913

913 (SAF region)

\(H_{\mathrm{{fl}}}^ -\) (T = 400 K) (Oe)

−204

−913

−204 (FM region)

\(\updelta H_{\mathrm{{fl}}}^ +\) (Oe)

27

122

122 (SAF region)

\(\updelta H_{\mathrm{{fl}}}^ -\) (Oe)

−27

−122

−27 (FM region)

\(\updelta E_{\mathrm{{fl}}}^ +\) (eV)

4

0.9

0.9 (SAF region)

\(\updelta E_{\mathrm{{fl}}}^ -\) (eV)

−4

−0.9

−4 (FM region)

\(\updelta E_{\mathrm{{fl}}}^{\mathrm{{ave}}}\) (eV)

4

0.9

2.5

  1. The first seven rows correspond to the quantities that are experimentally determined from the current-induced DW motion as shown in Fig. 4. The errors correspond to one standard deviation in these rows. The lower rows correspond to the quantities that are obtained from our model of thermal fluctuations (Extended Data Fig. 2). Note the bolded figures for comparison.