Magnetic irreversibility and the Verwey transition in nanocrystalline bacterial magnetite
Magnetic irreversibility and the Verwey transition in nanocrystalline bacterial magnetite
The magnetic properties of biologically-produced magnetite nanocrystals biomineralized by four different magnetotactic bacteria were compared to those of synthetic magnetite nanocrystals and large, high quality single crystals. The magnetic feature at the Verwey temperature, $T_{V}$, was clearly seen in all nanocrystals, although its sharpness depended on the shape of individual …