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Role of Magnetism i...
Role of Magnetism in the Formation of a Short-Range Order in Iron-Silicon Alloys
- Article/chapterEnglish2011
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LIBRIS-ID:oai:DiVA.org:kth-37172
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37172URI
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https://doi.org/10.1134/S1063776111040066DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The formation of a short-range order in soft magnetic Fe-Si alloys depending on the annealing temperature has been investigated theoretically and experimentally. The B2-type short-range order has been observed in samples quenched from temperatures T > T(C) (where T(C) is the Curie temperature) with the content c(Si) close to the boundary of the two-phase region. Annealing at temperatures T < T(C) for the content c(Si) >= 0.08 leads to an increase in the fraction of regions with the D0(3)-type short-range order. The mechanism of the formation of the short-range order in Fe-Si solid solutions has been analyzed by the Monte Carlo simulation with the ab initio calculated interatomic interaction parameters. It has been shown that the energy of the effective Si-Si interaction in bcc iron strongly depends on the magnetic state of the matrix. As a result, the B2-type short-range order is formed at T > T(C) and is fixed at quenching, whereas the D0(3)-type short-range order is equilibrium in the ferromagnetic state. The results reveal the decisive role of magnetism in the formation of the short-range order in Fe-Si alloys and allow the explanation of the observed structural features of the alloys depending on the composition and temperature.
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Kuznetsov, A. R.
(author)
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Gornostyrev, Yu. N.
(author)
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Ruban, Andrei V.KTH,Tillämpad materialfysik(Swepub:kth)u1uo08he
(author)
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Ershov, N. V.
(author)
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Lukshina, V. A.
(author)
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Chernenkov, Yu. P.
(author)
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Fedorov, V. I.
(author)
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KTHTillämpad materialfysik
(creator_code:org_t)
Related titles
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In:Journal of Experimental and Theoretical Physics112:5, s. 848-8591063-77611090-6509
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