You can find a range of bio-compatible magnetic fluids with enhanced magnetic properties online or in stores that specialize in laboratory supplies.
Synthesizing bio-compatible magnetic fluids with enhanced magnetic properties can be quite challenging. You may need to consult with a professional in chemical engineering or materials science in order to get it done.
Bio-compatible magnetic fluids usually involve ferrofluids, which are typically composed of iron nanoparticles suspended in a carrier liquid such as water or oil. Additionally, other materials, such as surfactants or polymers, may be added to enhance the properties of the fluid.