Fe-based compounds exhibit a rich diversity of magnetic phenomena, such as magnetovolume and magnetocaloric effects, which makes them very promising for basic studies as well as for a large number of applications. The magnetocaloric effect is the key for magnetic refrigeration, which could replace conventional gas compression technology. Magnetocaloric materials must display large temperature variations under an adiabatic magnetic field change and a large isothermal entropy response. The shape and behavior of the isothermal entropy change or the adiabatic temperature change can vary...