Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 51: Magnetism Poster B
MA 51.28: Poster
Thursday, April 4, 2019, 15:00–18:00, Poster C
The role of structural anisotropy in the magnetooptical response of an organoferrogel with mobile magnetic nanoparticles — Hajnalka Nadas11, Ralf Stannarius1, Jing Zhong2, Karin Koch2, Annette M. Schmidt3, Frank Ludwig2, and •Alexey Eremin3 — 1Institute of Physics, Otto von Guericke Universität Magdeburg Germany — 2Institute of Electrical Measurement Science and Fundamental Electrical Engineering, TU Braunschweig — 3Institut fü Physikalische Chemie, Universität zu Köln, Köln, Germany
We study magnetooptical and dynamic magnetic properties of organoferrogels containing mobile and bound magnetic nanoparticles (MNPs). The aim of the study is to investigate the coupling between the MNPs and a fibrillar gel network on the gel structure and magnetooptical properties. We demonstrate that the mobile MNPs forming doublets are responsible for the field-induced birefringence. The magnetooptical response becomes strongly suppressed in samples where the magnetic particles are bound via hydrogen bonds. We show that the structural anisotropy of the gel has a profound effect on the optical and magnetic response of the ferrogel.