Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2013 - zeszyt 4

Structure and low temperature electrical properties of LaCoO3 perovskite thin film produced by PLD technique

nr katalogowy: 79706

The electronic industries provides almost unlimited possibilities for the potential use of different nanomaterials, and therefore complex oxides have become highly competitive against commonly used metals and alloys. Both simple and complex metal oxides are often characterized by a wide range of significant changes in electrical, magnetic, mechanical, optical and catalytic properties. Several of these properties can be attributed to one specific compound - usually known as the multifunctional material. Under certain conditions (temperature and oxygen partial pressure) such materials can also exhibit characteristics of semiconductors (superconductors), ferroelectrics or ferromagnetic materials. The most interesting compositions (phases) described by uncommon properties are usually stable for a narrow range of high temperatures and very specific atmosphere, which makes them highly difficult to be examined correctly. Therefore, their application is often limited to specified conditions. The improvement in different vacuum techniques is necessary in order to produce multifunctional nanomaterials, stable at lower temperatures without losing their most desirable properties. During pulsed laser deposition process vacuum conditions are fully controlled and laser parameters can be easily and rapidly adjusted what makes this technique highly useful for the growth of desired nanostructures. For each material produced by PLD technique the precise optimization of all deposition parameters (vacuum and laser setup) is required. Perovskite-type LaCoO3 oxides have very interesting electrical magnetic, catalytic and mechanical properties [1÷4]. They are widely used as the replacement for the cermet anodes in solid oxide fuel cells due to their durability and improved thermal stability [5] and catalysts, i.e. in the automotive industry (CO oxidation) [6]. Thermal activation of LaCoO3 oxides leads to changes in their magnetic and electrical prop[...]

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