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首页> 外文期刊>Solid State Communications >Evidence of relaxor freezing in Pb(Mg_(13)Nb_(23))O _3BiFeO_3 ceramics
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Evidence of relaxor freezing in Pb(Mg_(13)Nb_(23))O _3BiFeO_3 ceramics

机译：Evidence of relaxor freezing in Pb(Mg_(13)Nb_(23))O _3BiFeO_3 ceramics

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摘要

The VogelFulcher (VF) relation has long been adopted to extract the freezing temperature (Tf) from a dielectric constanttemperature plot. It has been shown that the VF relation in the relaxation time (τmax) scale can be used for a more direct evaluation of Tf rather than ω(Tmax). But in our opinion, neither τmax nor ω(Tmax) gives direct evidence of freezing. Hence, in this letter, we have tried to give direct evidence for relaxor freezing and direct evaluation of Tf for a relaxor system Pb(Mg _(13)Nb_(23))O_3 with 20 mol BiFeO_3 using differential scanning calorimetric and pyroelectric measurements.

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