👉 The PM Fluid, also known as PMF (Permanent Magnetic Fluid), is a specialized, non-Newtonian fluid used in various applications requiring magnetic levitation and control. It is a complex mixture of fine iron particles suspended in an oil-based carrier, which gives it unique properties such as high viscosity at rest and a dramatic decrease in viscosity when subjected to a magnetic field. This allows objects to be suspended and moved by magnetic forces without physical contact, making it ideal for use in maglev trains, magnetic bearings, and other advanced mechanical systems where frictionless motion and precise control are essential.