• Magnetic properties of mixed valence La2/3Sr1/3Mn1−𝑥T𝑥O3 (T = Fe,Cr) manganites obtained by Pechini method

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      http://www.ias.ac.in/article/fulltext/jcsc/125/03/0667-0672

    • Keywords

       

      Mixed valence manganites; magnetic manganites; magnetocaloric effect; Pechini method.

    • Abstract

       

      Polycrystalline manganites of composition La2/3Sr1/3Mn1−𝑥T𝑥O3 (T = Cr3+ or Fe3+, x = 0.0-0.10) were obtained by the Pechini method. Their magnetic properties exhibited a marked dependence on Fe/Cr content, with significant reduction of the magnetic moment per formula unit and their Curie temperatures. In addition, the magnetocaloric effect, determined by isothermal magnetization measurements, displayed a decreasing tendency with increasing Fe/Cr concentration. Results were interpreted on the basis of a deleterious effect on the double exchange interaction provoked by the presence of Fe3+ and Cr3+ ions within the crystal structure.

    • Author Affiliations

       

      I Betancourt1 A Morales-Hernández1

      1. Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, México D.F. 04510, México
    • Dates

       
  • Journal of Chemical Sciences | News

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