Exchange Bias in Magnetic Nanoparticles

Project Summary

Exchange bias in magnetic nanoparticles is an important phenomenon that leads to enhanced magnetic anisotropy and shifted hysteresis loops. Both features are of particular interest in magnetic storage technology, while the underlying physical mechanism remains partially understood. The scientific objective of the project is to optimize the exchange bias behavior of hybrid magnetic nanoparticles for future application purposes in magnetic storage technologies and explore new control factors (nanoparticle shape and interparticle interactions) for this purpose.

Numerical modeling of the magnetic behavior at different time- and length-scales (Micromagnetics, Monte Carlo, Langevin Dynamics) is performed, in order to relate the nanostructural characteristics (size, shape, chemical composition, phase distribution) to the magnetic properties with emphasis on the enhancement of thermal stability and the exchange-bias effect.