Investigation of charge transport mechanism in semiconducting La0.5Ca0.5Mn0.5Fe0.5O3 manganite prepared by sol–gel method

Possibility of controlling the conduction mechanism by choosing a specific doping element in a praseodymium manganite system

“…However, for the higher frequency range, the obtained frequency exponent “ s 2 ” confirms the activation of the correlated barrier hopping (CBH) mechanism. 46,48,54–60 In the case of the conduction by the NSPT mechanism, the frequency exponent is given by:…”

“…A similar result was confirmed in the case Cr-PCMO sample. In this limit frequency parameter takes the form: 54–60 …”

“…Various conduction mechanisms have been used in manganites to understand the dynamics of charge carriers in each frequency interval based on the evolution of the frequency exponent with temperature. 33 For Co-PCMO compound, the exponent "s 1 " increases with increasing temperature conrming the activation of the nonsmall polaron tunneling (NSPT) mechanism 46,48,[54][55][56][57][58][59][60] in the intermediate frequency region. However, for the higher frequency range, the obtained frequency exponent "s 2 " conrms the activation of the correlated barrier hopping (CBH) mechanism.…”

“…However, for the higher frequency range, the obtained frequency exponent "s 2 " conrms the activation of the correlated barrier hopping (CBH) mechanism. 46,48,[54][55][56][57][58][59][60] In the case of the conduction by the NSPT mechanism, the frequency exponent is given by: 6 (a-d In such equation s 0 is a relaxation time and W M is the polaron hopping energy. The same result has been reported and investigated recently in Pr 0.7 Ca 0.3 Mn 0.95 Fe 0.05 O 3 compound.…”

“…A similar result was conrmed in the case Cr-PCMO sample. In this limit frequency parameter takes the form: [54][55][56][57][58][59][60] s ¼ 1 þ 3 lnðus 0 Þ Fig. 7 (a-d The obtained results from the evolution of the frequency exponent conrm that the change in the nature of the substitution element can be used to control the type of the activated conduction mechanisms.…”