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The influence of Sr and Fe on the conductance of magnetoresistant compounds

  • Physical Chemistry of Nanotechnologies
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Abstract

Single-phase giant magnetoresistance (GMR) compounds were prepared by doping the parent compound, NdMnO3, with Sr at Nd sites. The resistivity of the doped samples showed two prominent regions (Δρ/ΔT < 0, insulating and Δρ/ΔT > 0, metallic). The doped samples exhibited an enhancement in double exchange (DE) interactions causing an increase in T c (transition temperature). Magnetic field decreased the resistance of all the samples because of the suppression of spin fluctuations and an increase in disorder in the system. The polaron and variable range hopping (VRH) models were good for studying the transport mechanism of electrons and understand their behavior at T > T c.

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Authors and Affiliations

  1. Department of Chemistry, Hazara University, Mansehra, Pakistan

    Mohsan Nawaz, Faiza Jan Iftikhar & Wajid Rehman

  2. Department of Chemistry, Gomal University, Dera Ismail Khan, Pakistan

    Musa Kaleem Baloch

  3. Department of Physics, Louisiana State University, Alexandria, USA

    Iftikhar Ahmad

Authors
  1. Mohsan Nawaz
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  2. Faiza Jan Iftikhar
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  3. Musa Kaleem Baloch
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  4. Wajid Rehman
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  5. Iftikhar Ahmad
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Correspondence to Mohsan Nawaz.

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Nawaz, M., Iftikhar, F.J., Baloch, M.K. et al. The influence of Sr and Fe on the conductance of magnetoresistant compounds. Russ. J. Phys. Chem. 82, 2169–2172 (2008). https://doi.org/10.1134/S0036024408130025

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  • DOI: https://doi.org/10.1134/S0036024408130025

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