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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Magnetocrystalline anisotropy of Ni-Mn-Ga-Co-Cu martensite
 Rameš, Michal ; Straka, Ladislav ; Sozinov, A. ; Heczko, Oleg
The martensites of Heusler alloys based on Ni-Mn-Ga exhibit magnetically-induced reorientation resulting in giant field-induced strain. Up to 12% strain was observed in Ni-Mn-Ga-Co-Cu with 4 at.% of Co and Cu. The driving force of the phenomenon is the magnetocrystalline anisotropy. We studied evolution of the anisotropy with temperature and compositions using magnetiyation curve measurements in four different single crystalline Ni-Mn-Ga-Co-Cu and compared with non-doped Ni-Mn-Ga. The anisotropy of martensite decreases with increasing average doping (Co+Cu)/2 but it does not scale with tetragonal ratio or valence electron concentration.
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