Journal
PHILOSOPHICAL MAGAZINE LETTERS
Volume 90, Issue 12, Pages 851-859Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500839.2010.508446
Keywords
magnetic phase transition; thermal expansion; first-principles calculations; Invar
Categories
Funding
- Office of Naval Research (ONR) [N0014-07-1-0638]
- National Science Foundation (NSF) [DMR-0510180]
- DOE Basic Sciences [DOE DE-FG02-07ER46417]
- National Science Foundation [OCI-0821527]
- Office of Science of the US Department of Energy [DE-AC02-05CH11231]
- Arctic Region Supercomputing Center at the University of Alaska Fairbanks as part of the Department of Defense
Ask authors/readers for more resources
To understand the Invar anomalies, such as negative thermal expansion and spontaneous magnetization, we have applied our recently developed thermodynamic framework for a system with itinerant-electron magnetism to the ordered Fe3Pt. The framework has coherently predicted the finite temperature intermixing between the fully ferromagnetic (FM) configuration and the spin-flipping configurations (SFCs). We have also discovered a tri-critical point at which a high-temperature second-order phase transition, between the fully ordered FM phase and the paramagnetic phase which is disordered due to SFCs, becomes first order at low temperatures.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
