Effect Of Co3+ Substitution on Electro-Magnetic Properties of Pr¬0.75¬Na¬0.25¬mno¬3 ¬and Nd¬0.75¬Na¬0.25¬mno¬3¬ Manganites

  • Authors

    • Nurhabibah Nabilah Ab Mannan
    • Sufia Aqilah Razali
    • Suhadir Shamsuddin
    • Mohamad Zaky Noh
    • Zakiah Mohamed
    2018-11-30
    https://doi.org/10.14419/ijet.v7i4.30.22331
  • Charge Ordered, Double Exchange Mechanism, Manganites

  • Abstract

    This paper reports influences of cobalt (Co) substituted at Mn-site of Pr­0.75­Na­0.25Mn1-xCo­x­O­3 and Nd0.75Na0.25Mn1-yCoyO3 on structure, electrical transport and magnetic properties. All of the samples were prepared via standard solid state reaction method. X-ray diffraction measurement indicates that all samples were crystallized in an orthorhombic structure (space group Pnma). Resistivity measurement displays the x = 0 sample manifests an insulator behavior while metal-insulator transition was found at 108 K and 84 K for x = 0.02 and 0.05 respectively for Pr­0.75­Na­0.25Mn1-xCo­x­O­3. On the other hand, all of the samples for Nd0.75Na0.25Mn1-yCoyO3 showed insulator behavior down to low temperature and analysis of the resistivity change with respect to temperature, dlnÏ/dT-1 versus T reveals a slope changes of resistivity have been recorded. Two obvious peaks were recorded from the analysis for y = 0.02 and 0.05 which can be suggested to the existence of charge order transition at the vicinity. For magnetic properties, x = 0 sample showed a paramagnetic-antiferromagnetic transition and further substitution of Co, x = 0.02 and 0.05, induce the paramagnetic-ferromagnetic transition and antiferromagnetic arrangement respectively. Meanwhile, further substitution of Co, y = 0.02 and 0.05 indicate antiferromagnetic transition with increasing T­N­­­ as Co increased.

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  • How to Cite

    Mannan, N. N. A., Razali, S. A., Shamsuddin, S., Noh, M. Z., & Mohamed, Z. (2018). Effect Of Co3+ Substitution on Electro-Magnetic Properties of Pr¬0.75¬Na¬0.25¬mno¬3 ¬and Nd¬0.75¬Na¬0.25¬mno¬3¬ Manganites. International Journal of Engineering & Technology, 7(4.30), 389-392. https://doi.org/10.14419/ijet.v7i4.30.22331

    Received date: 2018-11-29

    Accepted date: 2018-11-29

    Published date: 2018-11-30