Table of Contents
Journal of Polymers
Volume 2015, Article ID 745751, 9 pages
Research Article

Thin Polymer Layers with Superparamagnetic Properties

Research Institute of Leather and Plastic Sheeting (FILK), 09599 Freiberg, Germany

Received 8 May 2015; Revised 31 August 2015; Accepted 1 September 2015

Academic Editor: Shin-ichi Yusa

Copyright © 2015 Kristin Trommer et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Superparamagnetic particles were widely used in medical applications as well as for magnetic sensors and actuators. Generally, the size of the particles is in the range of 10–20 nm. To use such particles in large-scale applications, a simple processing as well as the use of commercially available particles is required. Therefore superparamagnetic nanoparticles available on the market were incorporated in flexible polymer films and the magnetic properties of the films were investigated. At ambient temperature no significant hysteresis was observed, indicating the superparamagnetic properties. Films containing up to 25% nanoparticles were prepared. The films show a saturation magnetization of 13.8 Am2/kg and a coercivity of 7 Oe at ambient temperature.