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X-ray and thermal studies of ferroelectric Dy2(MoO4)3

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Abstract

Dysprosium molybdate, Dy2(MoO4)3, displays a ferroelectric phase transition at 145 °C. The X-ray and thermal (DTA, TG and DSC) properties of this compound have been studied. The X-ray study confirmed the ferroelectric phase in the orthorhombic space group Pba2. Thermal analysis demonstrated the existence of a ferroelectric and another phase transition in this compound.

Zusammenfassung

Dysprosiummolybdat, Dy2(MoO4)3 (Abk.: DMO), ein Vertreter der Seltener-denmolybdatreihe zeigt bei 145 °C einen ferroelektrischen Phasenübergang. Röntgendiffraktion und thermische Eigenschaften (DTA, TG, DSC) der genannten Verbindung wurden untersucht. Auf Grund der Röntgendiffraktionsuntersuchung gehört die ferroelektrische Phase in die orthorhombische Raumgruppe Pba2. Mittels Thermoanalyse konnte bei dieser Verbindung die Existenz ferroelektrischer und anderer Phasenübergänge nachgewiesen werden.

Резюме

Молибдат диспрозия п оказывает ферроэлектрический переход при 145 °C. Провед ены термический (ДТА, ТГ и Д СК) и рентгенострукту рные исследования данног о соединения. Рентгенофазовый ана лиз подтвердил, что ферроэлектрическая фаза относится к орторомбической про странственной групп е Pba2. Термический анализ п оказал наличие ферроэлектрическог о и другого фазового п ерехода.

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The authors wish to thank Prof. A. Paul and Mr. R. Bhatnagar for their kind help in some of the experimental work. One of us (MR) gratefully acknowledges a Fellowship from DST, Government of India.

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Roy, M., Choudhary, R.N.P. & Acharya, H.N. X-ray and thermal studies of ferroelectric Dy2(MoO4)3 . Journal of Thermal Analysis 35, 1471–1476 (1989). https://doi.org/10.1007/BF01912923

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  • DOI: https://doi.org/10.1007/BF01912923

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