1Laser Spectroscopy and Nanomaterials Lab, Physics Department, University of Allahabad, Allahabad 211002, India
2CSIR-National Physical Laboratory (NPL), New Delhi 110012, India
Adv. Mater. Lett., 2015, 6 (12), pp 1066-1072
Publication Date (Web): Nov 24, 2015
Copyright © IAAM-VBRI Press
Titanium ferrite nanoparticles (NPs) with controlled titanium to iron ratios (Ti/Fe) were synthesized using liquid-assisted pulsed laser ablation (LA-PLA) technique. Present manuscript describes effect of variation of Ti/Fe ratio in the target and the effect of laser pulse energy on size, shape, optical band gap, crystalline phase and magnetic properties of as-synthesized titanium ferrite NPs. UV-visible absorption, TEM and XRD investigations reveal that size of as-produced NPs decreases with the increase of Ti in the Ti/Fe targets used for ablation. Variation in laser pulse energy at a given Ti/Fe ratio has lesser dependence on size, shape and magnetic properties of produced NPs. Higher ferromagnetism with larger sized particles demonstrates dominance of bulk phenomenon over surface defects for the generation of ferromagnetic responsible spins. As-produced titanium ferrite nanomaterials may be used as promising magnetic recovery catalysts (MRCs).
Laser ablation, titanium ferrite NPs, magnetic nanomaterials, laser induced coagulation.