Magnetic fluid, also known as ferrofluid, is a type of liquid that becomes magnetized in the presence of a magnetic field. It consists of tiny magnetic particles, usually made of iron, suspended in a carrier liquid. These particles are so small that they remain evenly distributed and do not settle at the bottom, allowing the fluid to maintain its unique properties. When exposed to a magnetic field, magnetic fluid can change shape and form spikes or patterns, making it visually striking. This behavior is due to the alignment of the magnetic particles along the field lines. Magnetic fluids have various applications, including in seals, dampers, and even in medical imaging.