A setup for direct measurement of the adiabatic temperature change in magnetocaloric materials

In order to find a highly efficient, environment-friendly magnetic refrigerant, direct measurements of the adiabatic temperature change $\Delta T_{adb}$ is required. Here, in this work, simple setup for measurement presented. Using permanent magnet Halbach array with maximum field $1.8$ T and rate $5$ T/s, accurate determination possible system. The operating range system from $100$ K $400$ K, designed characterization materials potential room refrigeration applications. setup, first-order second-order compound have been studied. Results compared calculated dependent specific heat data. By comparing results indirect measurements, it concluded that reliable magnetocaloric effect, should be adopted.