Influence of global magnetic state on chemical interactions in high-pressure high-temperature synthesis of B2 Fe{sub 2}Si

Journal Article · Mon May 04 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3131784· OSTI ID:21294067

Ponomareva, A V ^[1]; Ruban, A V ^[2]; Dubrovinskaia, N ^[3]; Dubrovinsky, L ^[4]; Abrikosov, I A ^[5]

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1. Department of Theoretical Physicst, Moscow State Institute of Steel and Alloys, Moscow 119049 (Russian Federation)
2. Department of Materials Science and Engineering, Applied Materials Physics, Royal Institute of Technology, SE-100, 44 Stockholm (Sweden)
3. Mineralphysik und Strukturforschung, Mineralogisches Institut, Universitaet Heidelberg, 69120 Heidelberg (Germany)
4. Bayerisches Geoinstitut, Universitat Bayreuth, D-95440 Bayreuth (Germany)
5. 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

Related Subjects

36 MATERIALS SCIENCE
IRON ALLOYS
IRON SILICIDES
MAGNETIC MOMENTS
PARAMAGNETISM
PHASE DIAGRAMS
PRESSURE RANGE GIGA PA
SILICON ALLOYS