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Magnetic properties of Ni 2.18 Mn 0.82 Ga Heusler alloys with a coupled magnetostructural transition

2002; American Physical Society; Volume: 65; Issue: 9 Linguagem: Inglês

10.1103/physrevb.65.092410

1095-3795

Vladimir Khovaylo, Toshiyuki Takagi, Junji Tani, R. Z. Levitin, A. A. Cherechukin, M. Matsumoto, Ryunosuke Note,

Intermetallics and Advanced Alloy Properties

Polycrystalline ${\mathrm{Ni}}_{2.18}{\mathrm{Mn}}_{0.82}\mathrm{Ga}$ Heusler alloys with a coupled magnetostructural transition are studied by differential scanning calorimetry, magnetic and resistivity measurements. Coupling of the magnetic and structural subsystems results in unusual magnetic features of the alloy. These uncommon magnetic properties of ${\mathrm{Ni}}_{2.18}{\mathrm{Mn}}_{0.82}\mathrm{Ga}$ are attributed to the first-order structural transition from a tetragonal ferromagnetic to a cubic paramagnetic phase.