期刊
APPLIED PHYSICS LETTERS
卷 105, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4896853
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资金
- NSFC [61274037]
- Fundamental Research Funds for the Central Universities of China [2014QNA5003]
- Austrian Science Fund (FWF) [P25212-N30]
- EU COST program [IC-1208]
- Innovation Platform of Micro/Nanodevices and Integration System, Zhejiang University
- Austrian Science Fund (FWF) [P25212] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 25212] Funding Source: researchfish
AlN and AlScN thin films with 27% scandium (Sc) were synthesized by DC magnetron sputtering deposition and used to fabricate surface acoustic wave (SAW) devices. Compared with AlN-based devices, the AlScN SAW devices exhibit much better transmission properties. Scandium doping results in electromechanical coupling coefficient, K-2, in the range of 2.0% similar to 2.2% for a wide normalized thickness range, more than a 300% increase compared to that of AlN-based SAW devices, thus demonstrating the potential applications of AlScN in high frequency resonators, sensors, and high efficiency energy harvesting devices. The coupling coefficients of the present AlScN based SAW devices are much higher than that of the theoretical calculation based on some assumptions for AlScN piezoelectric material properties, implying there is a need for in-depth investigations on the material properties of AlScN. (C) 2014 AIP Publishing LLC.
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