Magnetic field-induced martensitic phase transformation in magnetic shape memory alloys: Modeling and experiments

Effects of demagnetization on Magnetic-Field-Induced Strain and microstructural evolution in Ni-Mn-Ga Ferromagnetic Shape Memory Alloy by phase-field simulations

“…Therefore, it is important to understand and quantify the demagnetization effects on both the macroscopic and microscopic behavior of Ni-Mn-Ga in MFIS. Although there exist experiments (e.g., among others, [7,12,25]) and models (e.g., among others, [23,[37][38][39]) studying on Ni-Mn-Ga by considering the demagnetization field, to the best of our knowledge, the investigation of the demagnetization effects on MFIS and the associated microstructural evolution as well as the fundamental physical mechanism regarding this material has not yet been reported. To develop a more complete understanding of the cause of the problem, further research on both the macroscopic and microscopic behavior of Ni-MnGa in MFIS as well as the utilization of more advanced quantitative analytical techniques is warranted.…”

Constitutive modelling of magnetic shape memory alloys with discrete and continuous symmetries

“…Here, we present only a couple of results, which are simplified, one-dimensional versions of this generalized modelling framework where the traction and magnetic field are applied along the same axial direction. Figure 5 represents the model predictions of the field-induced strain and magnetization [55]. Finally, we want to comment on the following fact.…”

“…The Gibbs free energy for such a mechanism, similar to FIVR, is considered by a quadratic expansion of the corresponding integrity basis. The detailed derivations of constitutive equations, model calibrations, model simulations and predictions can be found in [55]. Here, we present only a couple of results, which are simplified, one-dimensional versions of this generalized modelling framework where the traction and magnetic field are applied along the same axial direction.…”

Effect of site occupancy disorder on martensitic properties of Mn2NiIn type alloys: X-ray absorption fine structure study

“…Mn rich Ni-Mn-Z (Z = Ga, In, Sn or Sb) type shape memory alloys have been studied for their novel properties like giant reverse magneto-caloric effect [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], large magnetic field induced strain [18][19][20][21][22][23], magnetic superelasticity [24] and complex magnetic order [25][26][27][28][29][30][31]. The origin of all these effects lie in a strong coupling between structural and magnetic degrees of freedom.…”