Table 1 The material coefficients of BiFeO3 are used in phase-field simulations.
From: Phase-field simulations of vortex chirality manipulation in ferroelectric thin films
Coefficients | Value | Coefficients | Value |
|---|---|---|---|
a1 (×108 C−2m2N) | −3.73 | c11 (Nm−2) | 2.280 × 1011 |
a11 (×108 C−4m6N) | 2.29 | c12 (Nm−2) | 1.250 × 1011 |
a12 (×108 C−4m6N) | 3.06 | c44 (Nm−2) | 6.500 × 1010 |
a111 (×107 C−6m10N) | 5.99 | Q11 (C−2m4) | 0.032 |
a112 (×105 C−6m10N) | −3.34 | Q12 (C−2m4) | −0.016 |
a123 (×108 C−6m10N) | −1.78 | Q44 (C−m4) | 0.02 |
G11 (C−2m4N) | 0.6 | T (K) | 300 |
G12 (C−2m4N) | 0 | \({k}_{11}={k}_{22}={k}_{33}\) | 45 |
G44 (C−2m4N) | 0.3 | P0 (Cm−2) | 0.52 |
f11 (V) | 2.5 | f22 (V) | 2.5 |
f44 (V) | 0.05 | εxx = εyy | 0 |
