Table 1 The relaxation times τ and the diffusion coefficients D deduced from the dR/dt curves in the oxidation cycle at various temperatures

From: Ultrafast Atomic Layer-by-Layer Oxygen Vacancy-Exchange Diffusion in Double-Perovskite LnBaCo2O5.5+δ Thin Films

 

Co2.5+ → Co3+ step

Co3+ → Co3.5+ step

T (°C)

τ (×10−14 s)

D (×10−2 cm2/s)

τ (×10−10 s)

D (×10−6 cm2/s)

240

6.56 ± 1.86

1.64 ± 0.46

-

-

260

2.44 ± 0.51

0.62 ± 0.17

-

-

280

5.49 ± 0.84

1.37 ± 0.24

1.04 ± 0.27

1.45 ± 0.19

300

1.09 ± 0.07

1.39 ± 0.08

18.6 ± 2.3

0.082 ± 0.013

320

4.92 ± 0.69

0.31 ± 0.05

49.5 ± 0.2

0.031 ± 0.000

350

-

-

3.52 ± 0.02

0.430 ± 0.003

400

-

-

(9.25 ± 0.07) × 10−3

163 ± 2

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