Temperature dependence of the activation energy of manganite conductivity in the paramagnetic phase |
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| Authors: | E A Neifel’d V E Arkhipov N A Ugryumova A V Korolev Ya M Mukovskii |
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| Institution: | (1) Institute of Metal Physics, Ural Division, Russian Academy of Sciences, ul. Sof’i Kovalevskoi 18, Yekaterinburg, 620041, Russia;(2) Moscow State Institute of Steel and Alloys, Leninskii pr. 4, Moscow, 119049, Russia |
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| Abstract: | The temperature dependence of the magnetic component of the activation energy of hopping conductivity ?m of manganites in the paramagnetic phase (?m = ? m 0 ± a/T, where the signs “+” and “?” correspond to the antiferromagnetic CaMnO3 ? δ and ferromagnetic La0.85Sr0.15MnO3 manganites, respectively) has been found and investigated. The results obtained have been qualitatively explained on the basis of the model proposed by Gor’kov and colleagues. |
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