  Permalloy nanoparticles containing bacterial cellulose hydrogel obtained
after reduction was compressed into a xerogel flexible sheet by hot pressing at
60 C at different pressures. The permalloy nanoparticles with an ordered
structure have a bimodal size distribution centered around 25 nm and 190 nm.
The smaller nanoparticles are superparamagnetic while the larger particles are
ferromagnetic at room temperature. The sheets have a room temperature
magnetisation of 20 emu/g and a coercivity of 32 Oe. The electrical
conductivity of the flexible sheets increases with hot pressing pressure from 7
S/cm to 40 S/cm at room temperature.
