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<p>Perovskite-type manganites Y<sub>1-x</sub>Ca<sub>xF</sub>MnO<sub>3</sub> in the composition range of <i>x</i> = 0.2 of orthorhombic crystal structure was synthesized through solid-state route. XRD cast-off for checking phase configuration using XRD and with support of freely available FullProf program. Different structural parameters were measured after refinement of data. Impedance spectroscopy was useful to discover response of diverse electrical characteristics like conduction mechanism, electrical conductivity, different relaxation processes, and capacitance of probed sample under the variation of temperature and frequency. Electrical constraints of grain boundaries specify a deviation in electrical transport phenomena about 110 K termed as T<sub>MI</sub>. Different electrical parameters were evaluated in terms of temperature and frequency effects on conduction mechanism through hopping, having double exchange through Mn<sup>3+</sup> and Mn<sup>4+</sup>. Contrary to the typical investigation of Arrhenius behavior, the conduction processes of the charge carriers in the system have been investigated using conduction models of small-polaron hopping (SPH) and variable range hopping (VRH) models in a wide range of temperature and applied frequency.</p>

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Frequency and Temperature Effects on Trapped Centers Activation and Charge Transport Mechanism in Y0.2Ca0.8MnO3

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • K. Shehzad,
  • Matiullah Shah,
  • Arifa Sakhawat,
  • M. Nadeem,
  • K. Mehmood,
  • Saadat Khan,
  • Q. Ain,
  • B. Maryam,
  • Anas Ramzan,
  • Uzma Ghazanfar

摘要

Perovskite-type manganites Y1-xCaxFMnO3 in the composition range of x = 0.2 of orthorhombic crystal structure was synthesized through solid-state route. XRD cast-off for checking phase configuration using XRD and with support of freely available FullProf program. Different structural parameters were measured after refinement of data. Impedance spectroscopy was useful to discover response of diverse electrical characteristics like conduction mechanism, electrical conductivity, different relaxation processes, and capacitance of probed sample under the variation of temperature and frequency. Electrical constraints of grain boundaries specify a deviation in electrical transport phenomena about 110 K termed as TMI. Different electrical parameters were evaluated in terms of temperature and frequency effects on conduction mechanism through hopping, having double exchange through Mn3+ and Mn4+. Contrary to the typical investigation of Arrhenius behavior, the conduction processes of the charge carriers in the system have been investigated using conduction models of small-polaron hopping (SPH) and variable range hopping (VRH) models in a wide range of temperature and applied frequency.