Küçükdermenci S.Kutluay D.Avgyn Y.2019-10-262019-10-2620131580-29491580-2949https://hdl.handle.net/11454/18055Highly water-soluble Fe3O4/PAA (polyacrylic acid) nanoparticles (NPs) were synthesized with the high-temperature hydrolysis method. We report the first demonstration of Faraday rotation (FR) for a magnetic fluid (MF) synthesized with this novel method. The experiments were performed in the DC regime (0-6. 10C-2 T) at room temperature for 14 concentrations from 1.8 mg/ml to 5 mg/ml. The maximum rotation was recorded as 0.96° cm-1 for 3.33 mg/ml and this is called the critical concentration (CCRITICAL). It was found that the rotation tends to decrease when the concentration is higher than CCRITICAL. The MF behavior for FR is discussed with respect to substructure interactions (particle-particle, chain-chain). This work provides a new insight for the FR investigations of MFs including highly water-soluble magnetic NPs.eninfo:eu-repo/semantics/closedAccessFaraday rotationFe3O4 NanoparticlesMagnetic fluidsMagneto-Optic responseArticle4717178Q3