Structural properties and phase formation of epitaxial PbVO3 thin films grown on LaAlO3(001) by pulsed laser deposition
- 주제(키워드) lead vanadate , polar magnetic , thin film , epitaxial growth , pulsed laser deposition
- 등재 SCIE, SCOPUS
- 발행기관 IOP PUBLISHING LTD
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000091225
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/0022-3727/47/24/245302
초록/요약
We report epitaxial synthesis of PbVO3 (PVO) thin films on LaAlO3 (LAO) (0 0 1) substrates under reduction atmosphere from a Pb2V2O7 sintered target over a wide range of temperatures using laser ablation. Polar magnetic PVO has a non-centrosymmetric structure (tetragonality c/a = 1.23). The effects of substrate temperature on structural properties and chemical composition of PVO thin films were studied by x-ray diffraction and energy-dispersive spectrometry. The c-axis of the PVO films was abnormally elongated as much as 5-7% on the well-lattice-matched LAO substrates. Using Raman scattering spectroscopy, single phase formation of PVO with the shift of phonon modes was confirmed and epitaxial growth of the PVO films was also confirmed with polarization-dependent measurements. The strained and epitaxial growth of the PVO films will lead to a new class of multiferroic materials with future electronic device applications.
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