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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23690

Title: Growth-temperature-dependent microstructure and ferromagnetic properties of perovskite manganite-based heterostructures
Authors: Yuan-Chang Lian
Contributors: NTOU:Institute of Materials Engineering
Keywords: A. Films;B. Surfaces;D. Perovskites
Date: 2010-12
Issue Date: 2011-10-20T08:07:15Z
Publisher: Ceramics International
Abstract: Abstract:Oxide heterostructures composed of ferromagnetic La0.7Ba0.3MnO3 (LBMO) spacers and paramagnetic LaNiO3 (LNO) spacers were grown on SrTiO3 (0 0 1) substrates at various substrate temperatures. The X-ray diffraction (XRD) patterns confirm the formation of the heterostructure at a growth temperatures of 400–600 °C. A high substrate temperature of 700 °C caused serious atomic intermixing between the LBMO and the LNO spacers of the heterostructure, further degrading the crystalline quality of the heterostructure. The ferromagnetic LBMO spacer in the heterostructure is under biaxial compressive stress. The XRD results reveal that the lattice of the heterostructure was elongated parallel to the c-axis at a growth temperature of 400–600 °C. Experiments that involve XRD, atomic force microscopy and X-ray photoelectron spectroscopy provide structural information on the designed heterostructures. The observed magnetization characteristics of the heterostructures show that lattice strain and the quality of the surface and the interface of heterostructures affect the Curie temperature of the manganite layers.
Relation: 36(8), pp.2359-2364
URI: http://ntour.ntou.edu.tw/handle/987654321/23690
Appears in Collections:[材料工程研究所] 期刊論文

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