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Boron doping increased the magnetic coercivity from 1.5to22kAm-1 (19 to 276 Oe) in Ni 50 Mn 28.5 Ga 21.5 single crystals, which in combination with the multiferroic character of the material resulted in interesting new magnetomechanical effects. The material behaved as a semi-hard ferromagnet, which—in contrast to conventional ferromagnets—could be demagnetized by applying...
We measure the temperature dependence of twinning stress in alloys with composition between Ni50Mn28Ga22 and Ni50Mn29Ga21 in the temperature range 288–334K. For Type I twins, the twinning stress increases approximately linearly (0.04MPaK −1 ) with decreasing temperature. For Type II twins, it is temperature independent and is about 0.2MPa. The dependences are about the same in all alloys when...
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