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Proceedings of the National Academy of Sciences of Belarus, Chemical Series

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Electric conductivity and thermal expansion of highly coercive ferrites Sr1-xSmxFe12-xCoxO19

Abstract

Specific electric conductivity (æ) of Sr1-xSmxFe12-xCoxO19 ferrites has been measured in the 300-1100 K temperature range. It has been determined that conductivity activation energy for Sr1-xSmxFe12-xCoxO19 ferrites ( x = 0-0,5) in the temperature range above the Fracture temperature ( Tfrac) is 0,06-0,14 eV higher than the activation energy in the temperature range below the Tfrac. The coefficient of linear thermal expansion (α) for Sr1-xSmxFe12-xCoxO19 ferrites changes slightly when x is increased: from 1,20·10-5 K-1 for SrFe12O19 to 1,27·10-5 K-1 for Sr0,5Sm0,5Fe11,5Co0,5O19.
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ISSN 1561-8331 (Print)
ISSN 2524-2342 (Online)