The term ferro fluid refers to a liquid made of microscopic, ferromagnetic particles which acquires a powerful magnetism in the presence of another magnetic field. The particles are known as nanoparticles because of their extremely small size. These fluids are artificially produced in industrial settings. Each particle receives a coating of surfactant. This is a special compound that reduces surface tension and inhibits clumping among the ferromagnetic particles. The particles have a tendency to remain evenly spread throughout the fluid and resist settling. There are many types of applications for these fluids.

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