Title :
Crystal structures and magnetic anisotropy properties of Ni-Mn-Ga martensitic phases with giant magnetic-field-induced strain
Author :
Sozinov, A. ; Likhachev, A.A. ; Ullakko, K.
Author_Institution :
Lab. of Phys. Metall. & Mater. Sci., Helsinki Univ. of Technol., Finland
fDate :
9/1/2002 12:00:00 AM
Abstract :
Several kinds of martensitic phases have been found in nonstoichiometric Ni2MnGa alloys in numerous recent studies. The structural, magnetic, and mechanical properties important for a giant magnetic-field-induced strain response in these alloys are presented. Depending on the martensite crystal structure Ni-Mn-Ga alloys are able to show a really giant (about 6% or 10%) strain response in a magnetic field less than 1 T.
Keywords :
ferromagnetic materials; gallium alloys; lattice constants; magnetic anisotropy; magnetisation; magnetomechanical effects; manganese alloys; nickel alloys; shape memory effects; Ni-Mn-Ga; Ni-Mn-Ga martensitic phases; crystal structures; giant magnetic-field-induced strain; giant magnetic-field-induced strain response; lattice parameters; magnetic anisotropy properties; magnetic shape memory; magnetization curves; martensite crystal structure; mechanical properties; nonstoichiometric Ni2MnGa alloys; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic field induced strain; Magnetic properties; Magnetization; Mechanical factors; Perpendicular magnetic anisotropy; Phase modulation; Shape memory alloys; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803567
