Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping

被引：108

作者：

Bhushan, Bhavya ^{[1
]}

Wang, Zhenxing ^{[2
]}

Tol, Johan ^{[2
]}

Dalal, Naresh S. ^{[2
]}

Basumallick, Amitava ^{[3
]}

Vasanthacharya, Nagasampagi Y. ^{[4
]}

Kumar, Sanjay ^{[5
]}

Das, Dipankar ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Kolkata Ctr, Kolkata 700098, India

[2] Florida State Univ, Natl High Magnet Field Lab, Dept Chem & Biochem, Tallahassee, FL 32306 USA

[3] Bengal Engn & Sci Univ, Dept Met & Mat Engn, Sibpur 711103, Howrah, India

[4] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[5] Jadavpur Univ, Dept Phys, Kolkata 700032, India

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2012年 / 95卷 / 06期

关键词：

DOPED BIFEO3; THIN-FILMS; SUPERPARAMAGNETISME; POLARIZATION;

D O I：

10.1111/j.1551-2916.2012.05132.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Ce-doped BiFeO3 (BFO) nanoparticles (NPs) were synthesized using a facile solgel route with varying Ce concentrations in the range of 15 mol%. Ferroelectric transition temperature was found to shift from 723 degrees C +/- 5 degrees C for pristine BFO NPs to 534 degrees C +/- 3 degrees C for 5 mol% Ce-doped BFO NPs. UVVis absorption spectra of BFO NPs showed a significant blue shift of similar to 100 nm on Ce doping. The Fourier transformed infrared (FTIR) spectrum centered similar to 550 cm(-1) becomes considerably broadened on Ce doping which is due to additional closely spaced vibrational peaks as revealed by the second derivative FTIR analysis. High-frequency EPR measurements indicated that clustering occurs at high dopant levels, and that Fe is present as Fe(3+)corroborating Mossbauer measurements. The values of saturation and remanent magnetization for 3% Ce-doped BFO NPs are 3.03 and 0.49 emu/g, respectively, which are quite significant at room temperature, making it more suitable for technological applications.

引用

页码：1985 / 1992

页数：8

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