Table 1.

Pre-exponential factors for skyrmion annihilation in a Pd/Fe/Ir(111) racetrack.

fcc-Pd/Fe/Ir(111)			hcp-Pd/Fe/Ir(111)
B (T)	νcol (s−1)	νesc (s−1)	B (T)	νcol (s−1)	νesc (s−1)
4	4.0 ⋅ 1014	1.2 ⋅ 1010	1	2.7 ⋅ 1010	1.1 ⋅ 109
5	2.7 ⋅ 1014	1.1 ⋅ 1010	2	4.4 ⋅ 1011	1.8 ⋅ 109
6	1.8 ⋅ 1014	1.1 ⋅ 1010	3	1.2 ⋅ 1012	2.4 ⋅ 109
7	1.2 ⋅ 1014	1.1 ⋅ 1010	4	2.0 ⋅ 1012	2.9 ⋅ 109
8	8.4 ⋅ 1013	1.1 ⋅ 1010	5	2.5 ⋅ 1012	3.3 ⋅ 109
9	5.9 ⋅ 1013	1.0 ⋅ 1010	6	2.8 ⋅ 1012	3.7 ⋅ 109
10	4.3 ⋅ 1013	1.0 ⋅ 1010	7	2.9 ⋅ 1012	4.0 ⋅ 109
11	3.1 ⋅ 1013	1.0 ⋅ 1010	8	3.0 ⋅ 1012	4.3 ⋅ 109
12	2.3 ⋅ 1013	1.0 ⋅ 1010	9	3.0 ⋅ 1012	4.7 ⋅ 109
13	1.7 ⋅ 1013	1.0 ⋅ 1010	—	—	—
14	1.3 ⋅ 1013	1.0 ⋅ 1010	—	—	—
15	9.7 ⋅ 1012	1.1 ⋅ 1010	—	—	—
16	7.3 ⋅ 1012	1.2 ⋅ 1010	—	—	—
17	5.5 ⋅ 1012	1.5 ⋅ 1010	—	—	—

The pre-exponential factors for the skyrmion collapse, ν_col, and escape, ν_esc, in a 23.5 nm wide Pd/Fe strip on Ir(111) for several applied magnetic field strengths and a temperature of 10 K. Calculations have been carried out for both fcc and hcp stackings of the Pd layer.