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Rohini Mani, Srungarpu N. Achary, Keka R. Chakraborty, Sudhanshu K. Deshpande, Joby E. Joy, Abanti Nag, Jagannatha Gopalakrishnan and Avesh K. Tyagi FeTiTaO6: A Lead-Free Relaxor Ferroelectric Based on the Rutile Structure Advanced Materials 20

Article first published online: 25 MAR 2008 | DOI: 10.1002/adma.200701940

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High-temperature relaxor ferroelectric behavior (Tm ∼ 550 K) is reported for the rutile-based oxide, FeTiTaO6. Our investigations of the structure and dielectric properties of MTiTaO6 (M = Al, Cr, Fe) have revealed that all the oxides possess disordered rutile structure but only the iron member shows a strong relaxor ferroelectric effect. The new material is lead-free and it is based on the rutile structure, unlike the conventional relaxors which are mostly derived from the perovskite structure.

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