Pulsed laser deposition of La0.67Ca0.33MnO3 thin films on LiNbO3 and surface acoustic wave studies |
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Authors: | Andreas Heinrich, Andreas L. H rner, Achim Wixforth,Bernd Stritzker |
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Affiliation: | aInstitute of Physics, Experimentalphysics IV, University Augsburg, 86135 Augsburg, Germany bInstitute of Physics, Experimentalphysics I, University Augsburg, 86135 Augsburg, Germany |
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Abstract: | Surface Acoustic Waves on piezoelectric substrates can be used to investigate the dynamic conductivity of thin films in a non-contact and very sensitive way, especially at low conductivities. Here, we report on such surface acoustic wave studies to characterize thin manganite film like La0.67Ca0.33MnO3, exhibiting a Jan Teller effect with a strong electron phonon interaction and a metal insulator transition at high temperatures. We report on the deposition of La0.67Ca0.33MnO3 on piezoelectric substrates (LiNbO3 in different crystal cuts, employing a pulsed laser deposition technique. The structural quality of the thin films are examined by X-Ray Diffraction, Scanning Electron Microscope and Energy Dispersive X-ray spectroscopy. For the electrical characterization, we employ the surface acoustic wave technique, accompanied by conventional direct current resistance measurements for comparison. |
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Keywords: | Surface acoustic waves Conductivity Pulsed laser deposition Surface structure X-ray diffraction |
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