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.
%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
}