Magnetic Nanoparticles
Owing to their potential for applications in areas such as magnetic recording, magnetic sensing, magneto-rheology or medical diagnosis and therapy, magnetic nanoparticles are among the most rapidly growing fields in applied materials research within the last decade. |
In our group, intermetallic nanomagnets are prepared from the gas phase. Presently, we aim at preparing FePt particles with a very high magnetic anisotropy and sizes in the nanometer range. If these particles are monodisperse, magnetically textured, and regularly arranged on a substrate, they are very promising materials candidates for the media of future ultra-high density magnetic data storage systems. In order to provide the required magneto-crystalline anisotropy, the FePt nanoparticles need to have the chemically ordered, tetragonal L10 crystal structure. |
| Projects: | Marie-Curie-ToK „Intensive Program for Transfer of Knowledge to Eastern European Reference Pole for Micro- and Nanotechnologies – NANOTEC-EST“ | |
| (Partner. Koordination: Univ. Politehnica Bukarest) | ||
| Co-workers: | Anja Kießling: (PhD student) | SiC formation in carbon nanotubes grown from permalloy catalyst particles. |
| Alexander Surrey: (PhD student) | HRTEM investigations on the H2 desorption in hydrided Mg nanoparticles. | |
| Maria Sparing: (PhD student) | Artificial pinning centers in YBa2Cu3O7-x thin films created by Y2O3 nanoparticles | |
| Darius Pohl: (PhD student) | Aberration-corrected HRTEM investigations of nanoparticles (e.g. FePt). | |
| Former Staff Scientist: | Ute Queitsch: (PhD student) | Ordered deposition of FePt-nanoparticles on biological substrates. |
| Elias Mohn: (PhD student) | In-flight optical heating of magnetic nanoparticles. | |
| Fig. 1: TEM micrograph of FePt nanoparticles deposited on an (electron transparent) amorphous carbon film. | Fig. 2: High resolution TEM micrograph of an individual FePt nanoparticle. The image is contrast enhanced by means of Fourier filtering (with kind support of T. Gemming, Dept. 31) |