Abstract
Properties of materials having a perovskite-type oxide crystal structure ABO3 can easily be modified by means of partial substitution of cations located at A or B sites. Nonstoichiometric lanthanum-strontium cobalt oxides (La,Sr)CoO3 also referred to as LSCO exhibit electrical conductivity and ferromagnetic properties. Perovskite-type compounds LaCoO3 and SrCoO3 can form solid solutions in every ratios to each other. Notation (La,Sr)CoO3, or La(1-x)SrxCoO3 means that some lanthanum ions are substituted with the strontium ones at A sites of crystal cell. This paper describes a sol-gel manufacturing process of LSCO thin films, presents measurements of their resistivity vs. composition, shows thermal coefficient of selected composition resistivity as well as its magnetoresistive properties.
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