**3.3 The magnetic system of Kirol**

This system was designed by Kirol (Yu, 2003) on the principle of a rotating machine and Ericsson's cycle. The magnetic field is produced by permanent magnets NdFeB and reaches a maximum value of 0.9 T in the air-gap. The refrigerant rotor is composed of a flat disk of 270 g of gadolinium as magnetocaloric material. During one rotation of the rotor, the four thermodynamic cycles are operated and a Δ*T* of 11 K is obtained.
