A poly(methyl methacrylate) based composite coating containing magnetic nanostructures is developed that has the potential to equip passive titanium-based bone implants with the functionality of exercising an electromagnetic stimulus on bone regeneration. The thermal synthesis of maghemite nanoflowers is investigated, using iron chlorides in the presence of sodium hydroxide in a solvent mixture of N-methyldiethanolamine and diethylene glycol. A coating routine is developed to obtain a thin polymer film containing evenly dispersed magnetic nanoflowers.