Enhanced magneto-optic activity of magnetite-based ferrofluids subjected to gamma irradiation |
| |
| Authors: | Devi Manasi Das Rupali Mohanta Dambarudhar Baruah Kishor Kumar Saha Abhijit |
| |
| Institution: | (1) Nanoscience and Soft Matter Laboratory, Department of Physics, Tezpur University, PO Napaam, Assam, 784028, India;(2) UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8 Bidhannagar, Kolkata, 700 098, India; |
| |
| Abstract: | We report here the effect of γ-irradiation on the particle size and size distribution dependent spectroscopic and magneto-optic properties of ferrofluids,
synthesized by a co-precipitation method. The X-ray diffraction (XRD) study exhibits magnetite (Fe3O4) phase of the particles while electron microscopic and dynamic light scattering (DLS) studies have predicted particle growth
upon γ-irradiation. Further, Fourier transform infrared (FT-IR) spectroscopy studies ensured that no dissociation has occurred due
to irradiation effect. As a consequence of magneto-optic behavior reflected in the Faraday rotation (FR) measurement, the
Verdet constant increased from a value of 0.64×10−2 for the pristine sample to 5.6×10−2 deg/Gauss-cm for the sample irradiated with the highest dose (2.635 kGy). The substantial enhancement in the FR is assigned
to the improvement in associated chaining effect owing to adequate particle growth where an increased stoichiometry variation
of Fe2+/Fe3+ is assured. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
