Physics – Condensed Matter – Materials Science
Scientific paper
2005-03-02
Physics
Condensed Matter
Materials Science
9 pages, 11 figures
Scientific paper
10.1103/PhysRevB.72.134403
We consider a recently introduced 2-D square-to-rectangle martensite model that explains several unusual features of martensites to study ferromagnetic martensites. The strain order parameter is coupled to the magnetic order parameter through a 4-state clock model. Studies are carried out for several combinations of the ordering of the Curie temperatures of the austenite and martensite phases and, the martensite transformation temperature. We find that the orientation of the magnetic order which generally points along the short axis of the rectangular variant, changes as one crosses the twin or the martensite-austenite interface. The model shows the possibility of a subtle interplay between the growth of strain and magnetic order parameters as the temperature is decreased. In some cases, this leads to qualitatively different magnetization curves from those predicted by earlier mean field models. Further, we find that strain morphology can be substantially altered by the magnetic order. We have also studied the dynamic hysteresis behavior. The corresponding dissipation during the forward and reverse cycles has features similar to the Barkhausen's noise.
Ananthakrishna Garani
Sreekala S.
No associations
LandOfFree
A two dimensional model for ferromagnetic martensites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A two dimensional model for ferromagnetic martensites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A two dimensional model for ferromagnetic martensites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-283767