Spectral dependence of Faraday rotation in magnetite-polymer nanocomposites

Barnakov, Yu. A.; Scott, Byron L.; Golub, Vladimir; Kelly, Lisa A.; Reddy, ‬V. Raghavendra; Stokes, Kevin L.

doi:10.1016/j.jpcs.2003.10.070

Cited by 43 publications

(31 citation statements)

References 16 publications

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“…The ferromagnetic behaviour of such optically transparent magnetic plastics corresponds to a multidomain magnetite structure; therefore, they could find use in magneto-optical technology (see, for example, Ref. [442]). …”

Section: Metal Thiolates and Sulfides In The Polymer Matrixmentioning

confidence: 99%

Nanostructured Materials Preparation via Condensation Ways

Pomogailo

Джардималиева

2014

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Section: Metal Thiolates and Sulfides In The Polymer Matrixmentioning

confidence: 99%

Nanostructured Materials Preparation via Condensation Ways

Pomogailo

Джардималиева

2014

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“…Spectral Faraday rotation measurements were made in the polar configuration using the photoelastic modulator technique 16 as described in Ref. 6. Figure 1 shows the Faraday rotation spectra of magnetite nanoparticle/PMMA composite films.…”

Section: Methodsmentioning

confidence: 99%

“…4,5 In fact, we recently reported that shifts in the Faraday rotation spectrum of magnetite/polymer nanocomposites are observed with changes in the nanoparticle size, with particle diameters ranging from 8 to 200 nm. 6 In this paper, we report on shifts in Faraday rotation peak position dependent on the concentration of nanoparticles in the matrix. We estimate that the magnetite particles are separated ͑on average͒ by distances as small as a few nanometers.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optical spectra of closely spaced magnetite nanoparticles

Smith¹,

Barnakov²,

Scott³

et al. 2005

Journal of Applied Physics

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The Faraday rotation spectrum of composites containing magnetite nanoparticles is found to be dependent on the interparticle spacing of the constituent nanoparticles. The composite materials are prepared by combining chemically synthesized Fe 3 O 4 ͑magnetite͒ nanoparticles ͑8-nm diameter͒ and poly͑methylmethacrylate͒. Composites are made containing a range of nanoparticle concentrations. The peak of the main spectral feature depends on nanoparticle concentration; this peak is observed to shift from approximately 470 nm for ͑dilute composites͒ to 540 nm ͑concentrated͒. We present a theory based on the discrete-dipole approximation which accounts for optical coupling between magnetite particles. Qualitative correlations between theoretical calculations and experimental data suggest that the shifts in spectral peak position depend on both interparticle distance and geometrical configuration.

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“…The colloids of subdomain paramagnetic particles dispersed in a liquid carrier are termed ferrofluids. Ferrofluids exhibit a number of interesting magnetooptical phenomena including magnetically induced birefringence [7,8], magnetic dichroism [9], Faraday rotation and ellipticity [10]. Studies on optical limiting properties of SPION have also been reported [11].…”

Section: Introductionmentioning

confidence: 99%

Time dependent magnetically induced variations in optical transmission of magnetite nanoparticle aqueous suspension

Malynych¹,

Moroz²

2011

Open Physics

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Ê Ú ¾½ ÂÙÒ ¾¼½½ ÔØ ½ ÇØÓ Ö ¾¼½½ ×ØÖ ØWe observe time dependent variations in the light intensity transmitted through an aqueous suspension of Fe 3 O 4 nanoparticles caused by applied DC magnetic field. Two types of variations can be distinguished. Fast response takes less than 1 ms while slow variations occur at the time interval from seconds to hundreds of minutes. Possible mechanisms of these variations are discussed. Formation of chain-like structures consisted from iron oxide nanoparticles is responsible for the slow variations. It is also accompanied by a diffraction pattern when the magnetic field is orthogonal to the light beam. Fast variations are due to particle rotation and reorientation of the magnetic moment inside a nanoparticle.

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Spectral dependence of Faraday rotation in magnetite-polymer nanocomposites

Cited by 43 publications

References 16 publications

Nanostructured Materials Preparation via Condensation Ways

Nanostructured Materials Preparation via Condensation Ways

Magneto-optical spectra of closely spaced magnetite nanoparticles

Time dependent magnetically induced variations in optical transmission of magnetite nanoparticle aqueous suspension

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