Influence of global magnetic state on chemical interactions in high-pressure high-temperature synthesis of B2 Fe{sub 2}Si
- Department of Theoretical Physicst, Moscow State Institute of Steel and Alloys, Moscow 119049 (Russian Federation)
- Department of Materials Science and Engineering, Applied Materials Physics, Royal Institute of Technology, SE-100, 44 Stockholm (Sweden)
- Mineralphysik und Strukturforschung, Mineralogisches Institut, Universitaet Heidelberg, 69120 Heidelberg (Germany)
- Bayerisches Geoinstitut, Universitat Bayreuth, D-95440 Bayreuth (Germany)
- Department of Physics, Chemistry and Biology (IFM), Linkoeping University, SE-581 83 Linkoeping (Sweden)
We show that effective chemical interactions in an alloy can be tuned by its global magnetic state, which opens exciting possibilities for materials synthesis. Using first-principles theory we demonstrate that at pressure of 20 GPa and at high temperatures, the effective chemical interactions in paramagnetic Fe-Si system are strongly influenced by the magnetic disorder favoring a formation of cubic Fe{sub 2}Si phase with B2 structure, which is not present in the alloy phase diagram. Our experiments confirm theoretical predictions, and the B2 Fe{sub 2}Si alloy is synthesized from Fe-Si mixture using multianvil press.
- OSTI ID:
- 21294067
- Journal Information:
- Applied Physics Letters, Vol. 94, Issue 18; Other Information: DOI: 10.1063/1.3131784; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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