The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

JOURNAL OF ALLOYS AND COMPOUNDS

卷:694

Article

Basith, M. A.¹  Billah, Areef¹  Jalil, M. A.¹  Yesmin, Nilufar¹  Sakib, Mashnoon Alam^1,2  Ashik, Emran Khan^1,2  Yousuf, S. M. Enamul Hoque^1,2  Chowdhury, Sayeed Shafayet^1,2  Hossain, Md. Sarowar³  Firoz, Shakhawat H.⁴  Ahmmad, Bashir⁵ 

[1] Bangladesh Univ Engn & Technol, Dept Phys, Dhaka 1000, Bangladesh

[2] Bangladesh Univ Engn & Technol, Dept Elect & Elect Engn, Dhaka 1000, Bangladesh

[3] SN Bose Natl Ctr Basic Sci, Kolkata 700098, W Bengal, India

[4] Bangladesh Univ Engn & Technol, Dept Chem, Dhaka 1000, Bangladesh

[5] Yamagata Univ, Grad Sch Sci & Engn, 4-3-16 Jonan, Yonezawa, Yamagata 9928510, Japan

关键词: Multiferroics;    BiFeO3;    Magnetization;    Coercivity;    Exchange bias;    Leakage current;   

DOI  :  10.1016/j.jallcom.2016.10.018

来源: Elsevier

【 摘 要 】

In this investigation, undoped BiFeO3, Gd doped Bi-0.9Gd0.1FeO3, and Gd-Ti co-doped Bi0.9Gd0.1Fe1-xTixO3 (x = 0.10, 0.20) materials were synthesized to report their multiferroic properties. The structural analysis and phase identification of these multiferroic ceramics were performed using Rietveld refinement. The Rietveld analysis has confirmed the high phase purity of the 10% Gd-Ti co-doped Bi0.9Gd0.1Fe0.9Ti0.1O3 sample compared to that of other compositions under investigation. The major phase of this particular composition is of rhombohedral R3c type structure (wt% >99%) with negligible amount of impurity phases. In terms of characterization, we address magnetic properties of this co-doped ceramic system by applying substantially higher magnetic fields than that applied in previously reported investigations. The dependence of temperature and maximum applied magnetic fields on their magnetization behavior have also been investigated. Additionally, the leakage current density has been measured to explore its effect on the ferroelectric properties of this multiferroic system. The outcome of this investigation suggests that the substitution of 10% Gd and Ti in place of Bi and Fe, respectively, in BiFeO3 significantly enhances its multiferroic properties. The improved properties of this specific composition is associated with homogeneous reduced grain size, significant suppression of impurity phases and reduction in leakage current density which is further asserted by polarization vs. electric field hysteresis loop measurements. (C) 2016 Elsevier B.V. All rights reserved.

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