Title :
Magnetic and magnetoelastic properties of melt-spun Ni-Mn-Ga
Author :
Dearing, N. ; Jenner, A.G.
Author_Institution :
Dept. of Phys., Hull Univ., UK
Abstract :
We have fabricated single roller melt-spun ribbons of the ferromagnetic shape memory alloy NiMnGa. The ribbons´ magnetic and magnetoelastic responses and corresponding microstructure in the as-spun and annealed states were analyzed by a combination of vibrating sample magnetometry, X-ray diffraction, differential scanning calorimetery, capacitance dilatometry, and optical microscopy. The transformation strain in the annealed ribbons showed a dependence on the applied field of 600 ppm, whereas the as-spun samples did not display any field-induced strain.
Keywords :
X-ray diffraction; differential scanning calorimetry; ferromagnetic materials; gallium alloys; magnesium alloys; magnetoelastic effects; nickel alloys; optical microscopy; NiMnGa; X-ray diffraction; annealed ribbons; capacitance dilatometry; differential scanning calorimetery; ferromagnetic shape memory alloy NiMnGa; magnetic properties; magnetoelastic properties; magnetometry; melt-spun ribbon; optical microscopy; transformation strain; Annealing; Capacitance; Magnetic analysis; Magnetic field induced strain; Magnetic properties; Microstructure; Optical diffraction; Optical microscopy; Shape memory alloys; X-ray diffraction; Ferromagnetic shape memory; NiMnGa; melt spun;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.860204
