Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.14: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Mössbauer study of the particle-matrix interaction of cobalt ferrite nanoparticles — •Juri Kopp¹, Samira Webers¹, Melissa Hess², Joachim Landers¹, Annette M. Schmidt², and Heiko Wende¹ — ¹Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen — ²Institute for Physical Chemistry, University of Cologne

Previous magnetorheological measurements of cobalt ferrite nanoparticles in a polymer sucrose solution showed a polymer length dependent particle-matrix interaction between the polymer and the nanoparticles. Here, we study cobalt ferrite nanoparticles in a sucrose solution without the polymer as a reference measurement. For this purpose, sucrose solutions of different concentration were used to study the temperature dependent particle mobility via the change in line broadening observed in Mössbauer spectra. As expected, lower sucrose concentration showed a more water-like behavior and a more sudden increase of the line broadening than the one with higher sucrose concentration. Subsequently the results from the reference measurement are compared to Mössbauer spectra of the polymer sucrose solution. This work is supported by the DFG priority programme SPP1681.