Thermodynamic fluctuations in magnetic states: Fe3Pt as a prototype

Y. Wang, S. L. Shang, H. Zhang, L. Q. Chen, Z. K. Liu

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


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 Fe 3Pt. 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.

Original languageEnglish (US)
Pages (from-to)851-859
Number of pages9
JournalPhilosophical Magazine Letters
Issue number12
StatePublished - Dec 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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