Effect of alkaline earth metal doping on thermal, optical, magnetic and dielectric properties of BiFeO3 nanoparticles

被引：209

作者：

Bhushan, B. ^{[1
]}

Basumallick, A. ^{[2
]}

Bandopadhyay, S. K. ^{[3
]}

Vasanthacharya, N. Y. ^{[4
]}

Das, D. ^{[1
]}

机构：

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

[2] BESU, Dept Met & Mat Engn, Sibpur 711103, Howrah, India

[3] Ctr Variable Energy Cyclotron, Kolkata 700064, India

[4] IISc, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 06期

关键词：

ROOM-TEMPERATURE; CONSTANT;

D O I：

10.1088/0022-3727/42/6/065004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Substrate-free pure-phase BiFeO3 (BFO) nanoparticles doped with alkaline earth metals (Ba, Sr and Ca) have been synthesized by a sol-gel route and their thermal, optical, dielectric and magnetic properties are discussed. The characteristic structural phase transitions of BFO nanoparticles are found to occur at much lower temperatures. A reduction of the Neel temperature has been observed in the doped samples in comparison with the pristine one, whereas the band gap shows a reverse trend. Iron was found to be only in the Fe3+ valence state in all the doped samples. Magnetoelectric coupling is seen in our samples. Weak ferromagnetism is observed at room temperature in all of the doped and undoped BFO nanoparticles with the largest value of coercive field similar to 1.78 kOe and saturation magnetization similar to 2.38 emu g(-1) for Ba and Ca doped BFO nanoparticles, respectively.

引用

页数：8

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[1] MAGNETIC AND STRUCTURAL-PROPERTIES OF BIFEO3 [J].