Magnetocaloric properties are generally characterized by thermodynamic calculations with well-known Maxwell relation. However, with this calculation, some crucial factors for the magnetic cooling applications, for instance, magnetic thermal hysteresis, heat conductivity, corrosion resistance, etc. cannot be properly considered.
In order to study materials that can be used in the magnetic cooling system, the real cooling performance that can only be realized when the material is placed into the cooling system with cycle process should be investigated. For this purpose, the evaluation setups for the magnetic cooling performance in cycle process have been established. Through these evaluation methods, the results on whether the magnetocaloric materials can actually have better magnetic cooling performance in comparison with Gd in the magnetic cooling applications could be confirmed.
In this presentation, the direct measurement setups as an effective evaluation method of magnetocaloric properties of Mn-Fe-P-Si and La(Fe,Si)13 in cyclic process will be discussed in detail.