Blocking of magnetic moments of magnetosomes measured by magnetorelaxometry and direct observation by magnetic force microscopy

Large magnetosomes of 40 nm diameter were characterised by altogether four different methods, i.e. DC-magnetometry and magnetorelaxometry as integral tools, and atomic and magnetic force microscopy as microscopic tools. The results suggest that the integral hysteretic behaviour of magnetosomes can be understood as a superposition of their microscopic behaviour, ignoring interaction between the particle moments.