Influence of particle size on the magnetocaloric properties of Mn1.30Fe0.65P0.5Si0.5 powders.

A. Bartok (1) , Michaela Küpferling (2) , Carmen Curcio (2) , Vittorio Basso (2) , Karim Zehani (3) , Alexandre Pasko , Lotfi Bessais (3) , Frédéric Mazaleyrat , Martino Lobue

1 SATIE-MME - Matériaux Magnétiques pour l'Energie
2 INRiM - Istituto Nazionale di Ricerca Metrologica
3 ICMPE - Institut de Chimie et des Matériaux Paris-Est

We present the results of an experimental investigation on the magnetocaloric properties of Mn1.30Fe0.65P0.5Si0.5 powders with different average particle sizes. Specific heat capacity under magnetic field cp(H,T) and magnetic field induced isothermal entropy change Δsiso(H,T) were measured by Peltier calorimetry. Thermal hysteresis is found to decreases with the particle size, but the refrigerant performance, evaluated by using the product Δsiso ΔTad of the isothermal entropy change Δsiso and the adiabatic temperature change ΔTad , has only slight dependence on the particle size.

Mots clés: Magnetic materials; Magnetocaloric Effect

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Physique [physics]

A. Bartok, Michaela Küpferling, Carmen Curcio, Vittorio Basso, Karim Zehani, et al.. Influence of particle size on the magnetocaloric properties of Mn1.30Fe0.65P0.5Si0.5 powders. . 7th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VII). Turin, Italy, September 11-14, 2016., INRIM, Sep 2016, Torino, Italy. ⟨10.18462/iir.thermag.2016.0127⟩. ⟨hal-01790660⟩