Saturation magnetization and band gap tuning in BiFeO3 nanoparticles via co-substitution of Gd and Mn

JOURNAL OF ALLOYS AND COMPOUNDS

卷:687

Article

Hasan, Mehedi¹  Basith, M. A.²  Zubair, M. A.¹  Hossain, Md. Sarowar³  Mahbub, Rubayyat^1,4  Hakim, M. A.¹  Islam, Md. Fakhrul¹ 

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

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

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

[4] Carnegie Mellon Univ, Dept Materials Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA

关键词: BiFeO3;    Sol-gel;    Magnetization;    Optical band gap;    X-ray diffraction;   

DOI  :  10.1016/j.jallcom.2016.06.171

来源: Elsevier

【 摘 要 】

In this investigation, Gd and Mn co-doped Bi0.85Gd0.15Fe1-xMnxO3 (x = 0.0-0.15) nanoparticles have been prepared to report the influence of co-substitution on their structural, optical, magnetic and electrical properties. Due to simultaneous substitution of Gd and Mn in BiFeO3, the crystal structure has been modified from rhombohedral (R3c) to orthorhombic (Pn2(1)a) and the Fe-O-Fe bond angle and Fe-O bond length have been changed. For Mn doping up to 10% in Bi0.85Gd0.15Fe1-xMnxO3 nanoparticles, the saturation magnetization (M-s) has been enhanced significantly, however, for a further increase of doping up to 15%, the M-s has started to reduce again. The co-substitution of Gd and Mn in BiFeO3 nanoparticles also demonstrates a strong reduction in the optical band gap energy and electrical resistivity compared to that of undoped BiFeO3. (C) 2016 Elsevier B.V. All rights reserved.

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