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- W2116038404 abstract "With a view to investigate the influence of A-site cation mismatch on electrical, magnetic and magnetoresistance properties of Pr0.67A0.33MnO3, (A = Ca, Sr, Pb and Ba) manganites, a systematic investigation has been undertaken by preparing the materials using citrate gel route. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy. The XRD data were analyzed by Rietveld refinement method, while the crystallite sizes were estimated using the peak broadening technique. The unusual behavior of large magnetoresistance at low temperatures and at high magnetic fields has also been investigated. Finally, the high temperature electrical resistivity data were analyzed using variable range hopping and small polaron conduction mechanisms. A systematic investigation of the influence of average ionic radius of the A-site (〈rA〉) and cation mismatch (σ2) on electrical and magnetic properties, viz., transition temperatures, density of states at Fermi level, polaron activation energies etc., has been undertaken. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
- W2116038404 created "2016-06-24" @default.
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- W2116038404 date "2007-04-01" @default.
- W2116038404 modified "2023-10-13" @default.
- W2116038404 title "Influence of cation mismatch on electrical, magnetic and magnetoresistance properties of Pr0.67A0.33MnO3manganites" @default.
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- W2116038404 doi "https://doi.org/10.1002/pssa.200622426" @default.
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