The growth of high quality epitaxial La0.7Sr0.3MnO3 thin films was controlled on various substrates, including SrTiO3 (001), (110), vicinal substrates and Si. The design and development of applications such as uncooled bolometers and spintronic devices could then be considered. In this work, different deposition techniques were used: sputtering, pulsed laser deposition, assisted or not by RHEED (Reflection High Energy Electron Diffraction). The samples were characterized by X-ray diffraction, particularly studying epitaxy and strain in the layers. Further analyzes using RHEED, LEED (Low Energy Electron Diffraction), and STM/AFM (Scanning Tunneling and Atomic Force Microscopies) were also conducted, as well as resistivity and magnetization measurements as a function of the temperature. The effect of the orientation of the SrTiO3 substrate has been demonstrated. Finally, three examples of spintronic devices based on dead layer, vicinal surfaces or spin injection are presented.
from HAL : Dernières publications http://ift.tt/1pxeyHF
from HAL : Dernières publications http://ift.tt/1pxeyHF
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