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High-temperature ferroelectric phase transition observed in multiferroic Bi0.91La0.05Tb0.04FeO3
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2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 1, 12909- p.Article in journal (Refereed) Published
Abstract [en]

A single-phase Bi0.91La0.05Tb0.04FeO3 polycrystalline ceramic was fabricated by spark-plasma-sintering the precursor powder prepared by a sol-gel method. Temperature-dependent properties of polycrystalline Bi0.91La0.05Tb0.04FeO3 were characterized by x-ray diffraction, dielectric, and piezoelectric measurement. The x-ray diffraction results revealed a phase transition near 700 degrees C. Especially, temperature-dependent dielectric behavior demonstrated that there was a dielectric abnormal peak at about 697 degrees C, in addition to those two well-known dielectric abnormal peaks at 337 degrees C (Neel temperature) and 831 degrees C (Curie temperature). The observations, together with thermal depoled behavior, suggest a ferroelectric-ferroelectric phase transition from R(3)c to Pbnm at around 700 degrees C.

Place, publisher, year, edition, pages
2009. Vol. 95, no 1, 12909- p.
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Chemical Sciences
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URN: urn:nbn:se:su:diva-59978DOI: 10.1063/1.3158952ISI: 000267983200064OAI: oai:DiVA.org:su-59978DiVA: diva2:432342
Note
authorCount :8Available from: 2011-08-02 Created: 2011-08-02 Last updated: 2017-12-08Bibliographically approved

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