Patent ID: 7429339

Claim:
A method for synthesising a magnetic nanomaterial comprising an assembly of magnetic nanoparticles comprising the steps of: providing a first solution comprising a solvent with a carboxylic acid and an amine; adding the first solution to a metal-organic precursor to form a second solution; heating the second solution under pressure for a predetermined period to produce an assembly of thermodynamically stable magnetic nanoparticles each comprising a magnetic core that is ferromagnetic at a room temperature and/or an operating temperature between room temperature and 105°C., and a non-magnetic constituent encapsulating the magnetic core to make the magnetic nanoparticles protected against atmosphere contaminants and electrically isolated, the process conditions being adjusted so that the magnetic nanoparticles have a selected aspect ratio, and the nanomaterial having a permeability and ferromagnetic resonance suitable for use in MHz-GHz range frequencies.