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Maximum χac value, maximum phase angle, and corresponding optimal resonance frequency for various MgO barrier thicknesses.
| MgO (Å) | Maximum χac (a.u.) | Maximun phase angle θmax (degree) | Highest χac corresponding optimal resonance frequency fres (Hz) |
|---|---|---|---|
| 6 Å | 0.44 | 142.24 | 30 Hz |
| 8 Å | 0.52 | 96.44 | 30 Hz |
| 11 Å | 0.71 | 228.59 | 10 Hz |
| 13 Å | 0.27 | 103.47 | 10 Hz |
| 15 Å | 0.30 | 155.44 | 10 Hz |
