Highly Transparent γ‐Fe₂O₃/Vycor‐Glass Magnetic Nanocomposites Exhibiting Faraday Rotation

Abstract

The preparation and characterization of highly transparent (see Figure) and magnetic nanocomposites exhibiting Faraday rotation is reported. Superparamagnetic behavior results from the confinement of the γ‐Fe2O3 nanoparticles within the pores of a Vycor glass. The remarkable Faraday rotation exhibited by the resulting composites opens their application to a wide range of magneto‐optical devices.

Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite

“…Magneto-optical (MO) materials have numerous high-end photonic applications in optical isolators and circulators, optical switches, high performance magnetic field sensors and satellite navigation systems [1][2][3][4][5][6][7][8][9][10][11]. Faraday rotation (FR) is one of the most important MO phenomenon, in which the applied magnetic field changes the polarization plane of propagating linearly polarized light by inducing a circular birefringence [1][2][3]7,12].…”

Nonextensivity in magnetic nanoparticle ensembles

“…The slope of a best linear fit to the ⌰͑d 1 ͒ vs H a data for 0 Յ 0 H a Յ 0.02 T provides the Verdet constant V = 4.54 rad T −1 m −1 where ⌰ = V 0 H a h. Similar results have been found recently when taking into account different saturation magnetizations for different nanoparticle concentrations. 31 Within the noise level, the isotherms collapse as expected. The same holds for the corresponding ratios of the data sets shown in the inset.…”

Synthesis of Tunable Fe3O4@Mesoporous-silica-pillared Clay (MSPC) and Its Performance in Lysozyme Loading and Releasing Behavior

“…This phenomenon can be ascribed to the poor crystallization and the presence of magnetically inactive SiO 2 around iron oxide domain surfaces. 15 All of those samples show sufficient response to the external magnetic field (Fe 3 O 4 @ MSPC-4 as an example, Figure S3, Supporting Information).…”