Structural, microstructural and magneto-electric properties of single-phase BiFeO3 nanoceramics prepared by auto-combustion method

被引：39

作者：

Tripathy, Satya Narayan ^{[1
]}

Mishra, B. G. ^{[2
]}

Shirolkar, Mandar M. ^{[3
]}

Sen, S. ^{[4
]}

Das, Suprem R. ^{[5
]}

Janes, David B. ^{[5
]}

Pradhan, Dillip K. ^{[1
]}

机构：

[1] NIT Rourkela, Dept Phys, Rourkela 769008, India

[2] NIT Rourkela, Dept Chem, Rourkela 769008, India

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, USTC SHINCRON Joint Lab Adv Thin Film Tech & Mat, Hefei 230026, Anhui, Peoples R China

[4] CGCRI, Sensor & Actuator Div, Kolkata 700032, India

[5] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2013年 / 141卷 / 01期

关键词：

Ceramics; Chemical synthesis; Dielectric properties; Crystal structure; Powder diffraction; RAY-POWDER DIFFRACTION; ROOM-TEMPERATURE; MULTIFERROICITY; TRANSFORMATION; POLARIZATION; CRYSTAL;

D O I：

10.1016/j.matchemphys.2013.05.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline nano BiFeO3 powders were synthesized by auto-combustion method using urea as fuel and metal nitrates (Fe(NO3)(3).9H(2)O, Bi(NO3)(3)-5H(2)O) as oxidizers. In order to optimize the single-phase synthesis condition of BiFeO3, different fuel to oxidizer ratios have been investigated. The preliminary structural investigation using X-ray diffraction shows the samples were of single phase and crystallize in rhombohedral structure (R3c). The ferroelectric and antiferromagnetic ordering temperatures of BiFeO3 were found to be 832 degrees C and 364 degrees C respectively, from differential thermal analysis. The temperature dependent dielectric study shows an anomaly around 215 degrees C which corresponds to magneto-electric coupling in the material. Field-emission scanning electron micrographs show effect of fuel to oxidizer ratio on grain size evolution. The ferroelectric hysteresis loops for all the samples were measured at a frequency of 100 Hz confirming the ferroelectric nature. An evidence of magneto-electric coupling was also observed at room temperature from magneto-capacitance measurements. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：423 / 431

页数：9

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