Physics – Condensed Matter – Materials Science
Scientific paper
2005-04-26
Phys. Rev. B 71, 214412 (2005)
Physics
Condensed Matter
Materials Science
8 pages, 8 figures
Scientific paper
10.1103/PhysRevB.71.214412
The pressure dependence of electronic structure, exchange interactions and Curie temperature in ferromagnetic Heusler alloy Ni2MnSn has been studied theoretically within the framework of the density-functional theory. The calculation of the exchange parameters is based on the frozen--magnon approach. The Curie temperature, Tc, is calculated within the mean-field approximation by solving the matrix equation for a multi-sublattice system. In agrement with experiment the Curie temperature increased from 362K at ambient pressure to 396 at 12 GPa. Extending the variation of the lattice parameter beyond the range studied experimentally we obtained non-monotonous pressure dependence of the Curie temperature and metamagnetic transition. We relate the theoretical dependence of Tc on the lattice constant to the corresponding dependence predicted by the empirical interaction curve. The Mn-Ni atomic interchange observed experimentally is simulated to study its influence on the Curie temperature.
Bruno Patrick
Sandratskii Leonid M.
Sasioglu Ersoy
No associations
LandOfFree
Pressure dependence of the Curie temperature in Ni2MnSn Heusler alloy: A first-principles study 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 Pressure dependence of the Curie temperature in Ni2MnSn Heusler alloy: A first-principles study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure dependence of the Curie temperature in Ni2MnSn Heusler alloy: A first-principles study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-198972