%0 Journal Article %1 markus2008initio %A Gruner, Markus %A Entel, Peter %A Opahle, Ingo %A Richter, Manuel %D 2008 %J Journal of Materials Science %K entel %N 11 %P 3825--3831 %T Ab initio investigation of twin boundary motion in the magnetic shape memory Heusler alloy Ni2MnGa %U http://dx.doi.org/10.1007/s10853-007-2291-5 %V 43 %X Abstract  Magnetic shape memory (MSM) alloys, which transform martensitically below the Curie temperature in the ferromagnetic (FM) state, represent a new class of actuators. In Ni2MnGa, unusually large magnetic field-induced strains of about 10% have been observed. This effect is related to a high mobilityof martensitic twin boundaries in connection with a large magneto-crystalline anisotropy. MSM materials exist in a varietyof different martensitic structures depending on temperature and compositions. We investigate the energetics of L10 phase twin boundary motion quasi-statically with ab initio methods and relate the results to calculations of the magneto-crystallineanisotropy energy. Our results indicate that for the L10 structure the energy needed for a coherent shift of a twin boundary may be too large to be overcome solely by magnetic field-inducedstrains.

@article{markus2008initio, abstract = {Abstract  Magnetic shape memory (MSM) alloys, which transform martensitically below the Curie temperature in the ferromagnetic (FM) state, represent a new class of actuators. In Ni2MnGa, unusually large magnetic field-induced strains of about 10% have been observed. This effect is related to a high mobilityof martensitic twin boundaries in connection with a large magneto-crystalline anisotropy. MSM materials exist in a varietyof different martensitic structures depending on temperature and compositions. We investigate the energetics of L10 phase twin boundary motion quasi-statically with ab initio methods and relate the results to calculations of the magneto-crystallineanisotropy energy. Our results indicate that for the L10 structure the energy needed for a coherent shift of a twin boundary may be too large to be overcome solely by magnetic field-inducedstrains.}, added-at = {2009-09-13T13:31:02.000+0200}, author = {Gruner, Markus and Entel, Peter and Opahle, Ingo and Richter, Manuel}, biburl = {https://www.bibsonomy.org/bibtex/25af573ffbbb382306271f6858f6f3759/pbuczek}, description = {SpringerLink - Journal Article}, interhash = {3776a3e39efd56bedfdf53599b718382}, intrahash = {5af573ffbbb382306271f6858f6f3759}, journal = {Journal of Materials Science}, keywords = {entel}, month = {#jun#}, number = 11, pages = {3825--3831}, timestamp = {2009-09-13T13:31:02.000+0200}, title = {Ab initio investigation of twin boundary motion in the magnetic shape memory Heusler alloy Ni2MnGa}, url = {http://dx.doi.org/10.1007/s10853-007-2291-5}, volume = 43, year = 2008 }