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Structural and Magnetic Properties of Ln2CoMnO6(Ln=Dy and La) Produced by Combustion Synthesis

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Abstract

In this article, the structural and magnetic properties of the Ln2MnCoO6 (Ln=La and Dy) produced by the combustion method are reported. The samples were characterized by X-ray diffraction (XRD) with Rietveld refinement, and their magnetic properties by studying the dependence of the magnetization with the magnetic field and temperature. XRD analysis reveals that the La2MnCoO6 (LCM) consists of a mixture of crystalline orthorhombic, monoclinic, and rhombohedral phases. This mixture might be originated by the mixing of valence states of the Co+2/Mn+4 and Co+3/Mn+3. Dy2CoMnO6 (DCM) presents a mixed composition of hexagonal and orthorhombic structures with the transition metal atoms in mixed valences. Magnetic measurements show that the magnetic transition temperature T C decreases from 150 K to 85 K when the La ions are replaced by Dy. We also observe that the magnetic order changes from a ferromagnetic to a ferrimagnetic when La is replaced by Dy.

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Acknowledgements

The authors are grateful to Dr. Luis De Los Santos for critically reading the manuscript and to CAPES, CNPq, and FACEPE for their financial support (APQ-0589-1.05/08).

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Authors and Affiliations

  1. Programa de Pós-graduação em Ciência de Materiais, UFPE, 50670-901, Recife, PE, Brazil

    Pedro Linhares C. Filho & J. Albino Aguiar

  2. Departamento de Física, UFS, 49100-000, São Cristóvão, SE, Brazil

    Petrucio Barrozo

  3. Departamento de Física, Universidad Nacional de Colômbia, 5997, Bogota, DC, Colombia

    D. A. Landinez-Tellez

  4. Departamento de Física, USP, 05315-970, São Paulo, SP, Brazil

    R. F. Jardim

  5. Departamento de Química, UFPE, 50670-901, Recife, PE, Brazil

    W. M. Azevedo

  6. Departamento de Física, UFPE, 50670-901, Recife, PE, Brazil

    J. Albino Aguiar

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  1. Pedro Linhares C. Filho
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  2. Petrucio Barrozo
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  3. D. A. Landinez-Tellez
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  4. R. F. Jardim
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  5. W. M. Azevedo
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  6. J. Albino Aguiar
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Correspondence to Pedro Linhares C. Filho.

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C. Filho, P.L., Barrozo, P., Landinez-Tellez, D.A. et al. Structural and Magnetic Properties of Ln2CoMnO6(Ln=Dy and La) Produced by Combustion Synthesis. J Supercond Nov Magn 26, 2521–2524 (2013). https://doi.org/10.1007/s10948-012-1689-8

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  • DOI: https://doi.org/10.1007/s10948-012-1689-8

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