Seminarium Międzynarodowego Laboratorium Silnych Pól Magnetycznych i Niskich Temperatur PAN
14:00 czwartek, 05-03-15
ul. Gajowicka 95, sala seminaryjna (nowy budynek, II piętro)
ul. Gajowicka 95, sala seminaryjna (nowy budynek, II piętro)
Magnetocaloric effect in multicomponent compounds: Field, temperature and composition variations its value and sign near Curie point
Victoria Chzhan
IMET RAS, Moscow, Russia
In report the structural, magnetic and magnetocaloric properties for the multicomponent system Tb1-x(Dy0.5Ho0.5)x(Co, Al)2 will be discussed. Temperature dependence of lattice parameters and heat capacity were obtained. It will be shown that for Tb1-x(Dy0.5Ho0.5)x(Co, Al)2, the Curie temperatures (TC) increase but MCE values decrease with increasing Al content. The highest value of MCE (the adiabatic temperature change ΔTad = 2.0–2.7 K at μ0ΔH = 1.8 T) were observed for Al-free compounds exhibiting the transitions of the first order.
