Effect of La-substitution on structural, dielectric and electrical properties of (Bi0.5Pb0.5) (Fe0.5Zr0.25Ti0.25)O3

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• 作者：Niranjan Panda ; Samita Pattanayak ; R. N. P. Choudhary ; Ashok Kumar
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：122
• 期：9
• 全文大小：3,335 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physicsr>Condensed Matterr>Optical and Electronic Materialsr>Nanotechnologyr>Characterization and Evaluation Materialsr>Surfaces and Interfaces and Thin Filmsr>Operating Procedures and Materials Treatmentr>
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630
• 卷排序：122

文摘

As lead zirconium titanate and bismuth ferrite (BFO), members of perovskite family, have high dielectric constant and ferroelectric/ferromagnetic phase transition temperature, they are used for many potential applications including random access memory, sensors. The present work describes the modifications in the ferroelectric behaviour of PZT doped BFO due to substitution of few molar percent of La on Fe-site. A thorough comparative investigation of the frequency and temperature response of dielectric permittivity, dielectric loss, electric modulus, complex impedance and ferroelectric properties of Bi_0.5Pb_0.5 [Fe_{(0.5−class="EmphasisTypeItalic ">x)} La_x (Zr_0.25Ti_0.25)] O₃, where x = 0.0, 0.1, 0.2, 0.3 (hence forth called as BFPZLTO) compounds were studied in a wide frequency range 10 kHz to 1 MHz at temperature range 25–400 °C using ac impedance spectroscopy and electric modulus analysis. The structural analysis of compound revealed the tetragonal phase with space group P4 mm at room temperature. Cole–Cole plots are used for interpretation of relaxation mechanism in the materials. The materials especially the compound with x = 0.3 found more suitable to be used in transducers, RAMs, flip-flop memories, etc., for electronics applications.