Growth and structural characteristics of perovskite-wurtize oxide heterostructures


Yuan-Chang Liang;Yung-Ching Liang;


Wurtize ZnO thin films were grown on single-crystal perovskite SrTiO3 (100) substrates at various temperatures. The ZnO/STO thin films thus formed exhibits a preferred (110)-orientation at 700oC. A high growth temperature enhances not only the (110)-texture of ZnO/STO thin films but also the crystalline quality of the film. (La0.7Sr0.3)MnO3 (LSMO) thin films were grown on ZnO(110)/STO(100) substrate with various thicknesses, and were polycrystalline. A thicker LSMO film has a stronger (00l)-preferred orientation than the thinner one. The lattice distortion of LSMO decreases as the LSMO thickness increases. Magnetization vs. temperature curves show that both crystalline quality and lattice distortion influence the magnetic properties of LSMO thin films. The physical properties of manganite oxide can be modulated by forming heterostructures with wurtize ZnO.


Characterization; Thin films; Microstructure


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