We report on structural, magnetic, and transport properties of LaxMnO3-δ thin films, epitaxially grown on SrTiO3
substrates by molecular beam epitaxy deposition technique. We varied the La/Mn ratio by changing the evaporation rate
of the single-element diffusive cells. However, the oxygen content of LaxMnO3-δ thin films was varied by post-annealing
them in air and/or vacuum, by changing the annealing temperature and the time of post-annealing process. Optimal
oxygenated La0.88MnO3-δ (LMO) films show extremely high metal insulator transitions temperature TMI ~ 380K and
magneto-transport similar to those found in strontium-doped La1-xSrxMnO3 manganites compounds. Magnetic
measurements confirm the formation of a ferromagnetic phase at Curie temperature Tc of about 360K. All these findings
clearly demonstrate that the lanthanum deficiency, with respect to bivalent cation-substitution, is a very efficient way to
hole-dope manganites.
In this paper, we demonstrate the capability of the pulsed laser deposition techniques for designing the novel/new
multifunctional materials which are usually unachievable by classical synthesis routes. It details about the sequential
growth of various materials in form of superlattices by controlling them at nano-scale level in order to design the new
structures with multifunctional properties. A discussion on the issues related with role of thickness of the oxides in
designing the novel materials viz., multiferroics, together with how one can enhance the multifunctionality by
controlling the size of the oxides at nano-level are presented. Also a brief comments on the issues related to the growth
of the nano-oxides by pulsed laser deposition is discussed.
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