the idea has been developed to build the AMR from different MCMs along the regenerator. Each material should have its Curie temperature (and therefore the
largest MCE) in a different temperature range. In this way, the AMR could have a significant MCE across its full operating temperature span. As was presented in the previous sections on different MCMs, the tuning of Curie temperatures is of course possible by changing the concentrations of the certain elements in magnetocaloric compounds. Building the AMR from several MCMs with different Curie temperatures will lead to a step-wise change in the Curie temperatures along the AMR’s length (Fig. 2.2a).