Electrical characterizations of MgTiO3 thin films grown on Si |
| |
Authors: | Soonhong Ahn Younghun Lee Yonghan Roh Shinchung Kang Jaichan Lee |
| |
Affiliation: | 1. School of Electrical and Computer Engineering, Sungkyunkwan University , Suwon, 440-746, Korea;2. Department of Materials Engineering , Sungkyunkwan University , Suwon, 440-746, Korea |
| |
Abstract: | Abstract We have analyzed MgTiO3 thin films grown on the Si substrate with/without SiO2 using pulsed laser deposition (PLD). We find that MgTiO3 thin films start to crystallize at 600°C, causing electrical instabilities in the MIS capacitors above this temperature. Detailed analysis by XRD technique reveals that structural differences of MgTiO3 thin films were not obvious below 600°C, whereas the electrical characteristics changes as a function of deposition temperature and the presence of thermally grown SiO2. We observe that the decrease of deposition temperature results in the increase of leakage current and anomalous positive charge (APC) density. These drawbacks were effectively suppressed by growing 100A SiO2 layer on the Si substrate prior to the deposition of MgTiO3 thin films. |
| |
Keywords: | MgTiO3 MIS capacitors PLD SiO2 APC |
|
|