Transition metal titanium (Ti) doped LaFeO3 nanoparticles for enhanced optical structural and magnetic properties

JOURNAL OF ALLOYS AND COMPOUNDS

卷:712

Article

Sasikala, C.¹  Durairaj, N.²  Baskaran, I.¹  Sathyaseelan, B.³  Henini, M.^5,6  Manikandan, E.^4,6 

[1] Arignar Anna Govt Arts Coll, Dept Phys, Cheyyar 604407, Tamil Nadu, India

[2] VIT Univ, Ctr Crystal Growth, SAS, Vellore 632014, Tamil Nadu, India

[3] Univ Coll Engn Arni, Dept Phys, Arni 632326, Tamil Nadu, India

[4] Thiruvalluvar Univ, Dept Phys, TVUCAS Campus, Thennangur 604408, Tamil Nadu, India

[5] Univ Nottingham, Nottingham Nanotechnol & Nanosci Ctr, Sch Phys & Astron, Nottingham NG7 2RD, England

[6] Univ South Africa, Coll Grad Studies, UNESCO UNISA Africa Chair Nanosci & Nanotechnol, POB 392, Pretoria, South Africa

关键词: Crystallite size;    Nanoparticles;    Co-precipitation method;    Magnetic properties;    Coercivity;   

DOI  :  10.1016/j.jallcom.2017.04.133

来源: Elsevier

【 摘 要 】

A series of LaFe(1-x)TixO(3) (x = 0.0, 0.2, 0.4, 0.6 and 0.8) nanoparticles have been successfully synthesized by simple co-precipitation technique. The synthesized samples (calcined at 800 degrees C/3hr) were characterised for structural, optical and magnetic properties. Structural phase formation of the crystal shows orthorhombic planes of these samples phases. The average crystallite size (D-c) is decreasing with a dopant and found to be varying between similar to 9 and 25 nm. Tailored surface morphology was analyzed using scanning electron microscope (FESEM) and transmission electron microscopes (TEM) with selected area electron diffraction pattern (SAED) also confirms the evolution of orthorhombic phases. Diffuse reflectance spectra (DRS) are recorded to evaluate the variation of optical band gap (E-g) upon titanium doping into the LaFeo(3) system. The obtained results attributed that E-g values are increasing with dopant altering between 2.05 and 2.61 eV. The metal oxide (M - O) stretching vibrations and few functional groups are detected from infrared spectra (IR). The weak ferromagnetic behaviour is observed from hysteresis loop behaviour. Additionally, the large hysteresis loop behaviour induces no saturation up to 15 kO(e) in nanoparticles coercivity (H-c) and anisotropy constants (K-1) are eventually decreasing with 'x' values. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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