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Peculiarities of the magneto-optical response in dispersions of anisometric pigment nano-particles.

MPG-Autoren
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Ostapenko,  Tanya
Group Dynamics of fluid and biological interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Zitation

Eremin, A., Geng, Y., Stannarius, R., Ostapenko, T., Challa, P. K., Gleeson, J. T., et al. (2016). Peculiarities of the magneto-optical response in dispersions of anisometric pigment nano-particles. RSC Advances, 6(84), 80666-80669. doi:10.1039/c6ra12020b.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002B-AAC3-2
Zusammenfassung
We demonstrate an unusually strong magneto-optical response of elongated plate-shaped pigment particles in magnetic fields ranging from 0 to 25 T. In a weak field, the particles align perpendicular to the field and the dispersions exhibit the Cotton-Mouton effect. In a strong magnetic field, themagneto-optical behaviour is nonlinear and cannot be explained by a simple model of non-interacting diamagnetic rods in a thermal equilibrium. We also demonstrate that the addition of a small amount of magnetic particles results in a complex magneto-optical response, where the particles align parallel to a weak magnetic field and perpendicular to a strong one.