Fyzikální ústav Akademie věd ČR

Seminář Čtvrtek, 11.04.2013 14:00

Přednášející: J. Kaštil
Místo: Knihovna FZÚ AVČR, Cukrovarnická 10, Praha 6
Pořadatelé: Oddělení magnetik a supravodičů

The Ni₂MnGa Heusler compound are very promising smart materials with many applications. We have prepared polycrystalline samples of Co-doped off-stoichiometric Ni₂MnGa alloys with interesting magnetic properties of their martensitic phases, where a paramagnetic gap has been observed and tuned by composition. Saturated magnetisation of martensitic phases of these alloys strongly decreases with increasing Co and Mn content, transition into paramagnetic state occurs in the alloys with a rich Co-doping. We have prepared the Er-doped Ni_1.72Co_0.28Mn_1.24Ga_0.76 alloy with suppressed structural transition, to study magnetic properties of austenite phase of our studied alloys in large temperature range down to low temperature. MCE of the prepared polycrystalline samples of Co-doped off-stoichiometric Ni₂MnGa alloys has been measured by the direct method.

Přílohy:

kastil2013.pdf