Abstract
We report the epitaxial growth of multiferroic BiFeO 3 (BFO) film on Si(001) substrate by pulsed laser deposition using CeO 2/yttria- stabilized zirconia (YSZ) as buffer layers. The epitaxial relationships of the films were BFO(001)/CeO 2(001)/YSZ(001)/Si(001) for out-of-plane and [110]BFO∥[100]CeO 2∥[100]YSZ∥[100]Si for in-plane, respectively. Capacitance-voltage characteristics of a Pt/BFO/CeO 2/YSZ/p-Si capacitor exhibited clockwise hysteresis loops with a large memory window of 2.5 V at sweeping voltages of ±16 V. Both the high and low capacitance values showed no obvious degradation after 10 4 s. The improved retention property was attributed to the use of high-k CeO 2/YSZ insulating layers that effectively eliminated the charge trapping in the heterostructure.
| Original language | English |
|---|---|
| Article number | 252908 |
| Journal | Applied Physics Letters |
| Volume | 100 |
| Issue number | 25 |
| DOIs | |
| State | Published - 18 Jun 2012 |
| Externally published | Yes |