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Electric And Magnetic Properties Of (B1−xLax)FeO3 Solid Solutions

M. Połomska, W. Kaczmarek, Z. Pająk
Published 1974 · Physics

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Results are reported on the electric and magnetic properties of (Bi1−xLax)FeO3 solid solution exhibiting simultaneously long-range order of electric and magnetic dipoles. In the concentration range 0 ≦ x < 0.30 close to the Neel temperature, an anomaly of ϵ(T) attributed to the influence of a decay of magnetic ordering on the electric ordering, was observed. A temperature-concentration phase diagram is constructed. Within the framework of Benguigui's theory [16], an explanation is proposed for the anomaly in electric properties at the transition boundaries between structural modifications. Ce travail contient les resultats d'une etude des proprietes electriques et magnetiques de la solution solide (Bi1−xLax)FeO3 presentant simultanement l'ordre lointain des dipǒles electriques et magnetiques. A des concentrations 0 ≦ x < 0,30 aux environs de la temperature de Neel, on a observe une anomalie de ϵ(T), attribuee a une influence sur l'ordre electrique de la part de la disparition d'ordre magnetique. Un diagramme de phases en fonction de la temperature et concentration est donne. A partir de la theorie de Benguigui [16], les causes des anomalies des proprietes electriques apparaissant aux limites entre les modifications structurelles sont expliquees.



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