Structural and multiferroic properties of barium substituted bismuth ferrite nanocrystallites prepared by sol-gel method

被引：24

作者：

Anju ^{[1
]}

Agarwal, Ashish ^{[2
]}

Aghamkar, Praveen ^{[1
]}

Lal, Bhajan ^{[3
]}

机构：

[1] Chaudhary Devi Lal Univ, Mat Sci Lab, Dept Phys, Sirsa 125055, India

[2] Guru Jambheshwar Univ Sci & Technol, Dept Appl Phys, Hisar 125001, Haryana, India

[3] Goverment Polytech Women, Dept Appl Sci, Sirsa 125055, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 426卷

关键词：

Bismuth ferrite; Barium substitution; Magnetic properties; Ferroelectricity; Sol-gel; MAGNETIC-PROPERTIES; BIFEO3; BA; POLARIZATION;

D O I：

10.1016/j.jmmm.2016.09.103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline Bi1-xBaxFeO3 (0 <= x <= 0.3) multiferroics were efficiently obtained by sol-gel method after sintering at 800 degrees C for one hour. The Ba substitution in BiFeO3 (BFO) strongly modifies its structural and multiferroic properties. XRD studies revealed the structural transition from distorted rhombohedral (R3c) to pseudo-cubic (Pm3m) crystal symmetry. The magnetization increases appreciably for x=0.1, which is due to spin canting of magnetic moments at the nanoparticle surfaces and decreases afterward. From the temperature dependent magnetization studies, it is found that magnetic transition temperature (T-N) is 620 K for x=0 and 640 K for x-0.1. Besides, the maximum polarisation value decreases with increasing Ba content. SEM micrographs revealed the formation of cubic nanocrystallites with increased porosity on Ba substitution. FTIR analysis of the samples also supports the structural change towards increased crystal symmetry.

引用

页码：800 / 805

页数：6

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