Orientation and Magnetization of Nanoparticle Aggregates in Hybrid Ferrofluidic Dispersions
With the aim to enhance the magnetic, optical, and dynamic properties, conventional ferrofluids (consisting of spherical magnetic nanoparticles - maghemite and cobalt ferrite) are doped with anisometric nanoparticles (hematite nanospindles) resulting in so-called hybrid ferrofluids. The main objective of this proposal is to relate the magnetic moment of the superstructures formed in hybrid ferrofluidic dispersion with their orientation behavior in applied static magnetic field. Field dependent SANS measurements (performed in mixture of D2O/H2O to mask spherical nanoparticles) will reveal the orientation distribution of the nanospindles, which will allow to derive the nematic and magnetic order parameter. This study will be complemented with SANSPOL measurements which will help us to resolve the magnetic structure and the magnetic moment of the superstructure in the hybrid ferrofluidic dispersions. This experiment will allow us to resolve the nematic and magnetic order for the different hybrid dispersions.
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DISCH Sabrina; CUBITT Robert; GRAEF Kevin; HONECKER Dirk; PP Shanbogh; Asma and ZAKUTNA Dominika. (2020). Orientation and Magnetization of Nanoparticle Aggregates in Hybrid Ferrofluidic Dispersions. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-891
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