Room-temperature zero thermal expansion in a cubic perovskite oxide SrCu3Fe4−xMnxO12

A zero thermal expansion in a wide temperature range including room temperature has been achieved in a cubic perovskite oxide SrCu3Fe4−xMnxO12 for x = 1.5. Partial substitution of Mn for Fe in SrCu3Fe4O12 systematically changes the linear thermal expansion coefficient from negative [−6.4(2), −5.7(5)...

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Veröffentlicht in:Applied physics letters 2015-04, Vol.106 (15)
Hauptverfasser: Marukawa Shohei, Hayashi Naoaki, Matsushita Masafumi, Irifune Tetsuo
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Sprache:eng
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Zusammenfassung:A zero thermal expansion in a wide temperature range including room temperature has been achieved in a cubic perovskite oxide SrCu3Fe4−xMnxO12 for x = 1.5. Partial substitution of Mn for Fe in SrCu3Fe4O12 systematically changes the linear thermal expansion coefficient from negative [−6.4(2), −5.7(5), and −1.88(11) ppm/K for x = 0.5, 1, and 1.25, respectively] to almost zero [0.67(15) ppm/K for x = 1.5] to positive [2.97(17) ppm/K for x = 1.75] and the operational temperature window shifts to higher temperature ranges above room temperature. Crystal structure analysis and Mössbauer spectroscopy reveal that the zero thermal expansion for x = 1.5 composition is induced by intermetallic charge transfer between Cu and (Fe,Mn) ions. These results display the high potential of SrCu3Fe4−xMnxO12 for the development of zero thermal expansion materials.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4918293