Magnetic and magnetocaloric properties of partially disordered RFeAl (R = Gd, Tb) intermetallic

Jiri Kaštil (1) , P. Javorsky (2) , Jiri Kamarad (3) , Leopold Diop (1) , Olivier Isnard (1) , Zdenek Arnold (4)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 UK - Univerzita Karlova [Praha, Česká republika] = Charles University [Prague, Czech Republic]
3 Institute of Physics
4 Institute of Physics [Prague]

Magnetic and magnetocaloric properties of TbFeAl and GdFeAl were studied in a wide temperature region in magnetic field up to 10 T. They order magnetically below Tc ¼ 196 K and 259 K for TbFeAl and GdFeAl, respectively. The temperature change of DT ¼ 1.4 K and 1.6 K was observed in GdFeAl and TbFeAl respectively for a field change of 4 T. Interestingly wide temperature region of significant magnetocaloric effect was observed in both compounds which give rise to relative cooling power of 350 J kg 1 for TbFeAl and 348 J kg 1 for GdFeAl for 4 T field span.

Mots clés: Magnetic properties; Thermodynamic properties; Energy systems

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

Jiri Kaštil, P. Javorsky, Jiri Kamarad, Leopold Diop, Olivier Isnard, et al.. Magnetic and magnetocaloric properties of partially disordered RFeAl (R = Gd, Tb) intermetallic. Intermetallics, 2014, 54, pp.15-19. ⟨10.1016/j.intermet.2014.05.008⟩. ⟨hal-01002491⟩