Magnetic refrigeration is a method of refrigeration based on the magnetocaloric effect (MCE). This effect is defined as the heating or cooling (i.e.,the temperature change) of a magnetic material due to the application of a magnetic field. On the basis of magnetocaloric effect (MCE), in magnetic refrigeration, it is possible to create magnetic refrigerators –the machines where magnetic materials are used as working bodies instead of a gas, and magnetization/ demagnetization is used instead of compression/expansion in conventional refrigerators. In addition, since the working fluids are usually air and water, magnetic refrigeration offers the prospect of an energy-efficient and environment friendly alternative to the common vapor-cycle refrigeration.