Ab initio calculation of the solution enthalpies of substitutional and interstitial impurities in paramagnetic fcc Fe

In the framework of disordered local moment approach by using magnetic sampling method, we suggested a model that takes into account the magnetic disorder in paramagnetic Fe with point defects. We calculate solution enthalpies of substitutional (Nb, V) and interstitial (C, N) impurities in paramagne...

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Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-07, Vol.90 (1), p.014439, Article 014439
Main Authors: Ponomareva, A. V., Gornostyrev, Yu. N., Abrikosov, I. A.
Format: Article
Language:English
Subjects:
Carbon
Condensed matter
Disorders
Enthalpy
Ferromagnetism
Impurities
Interstitials
Mathematical models
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description In the framework of disordered local moment approach by using magnetic sampling method, we suggested a model that takes into account the magnetic disorder in paramagnetic Fe with point defects. We calculate solution enthalpies of substitutional (Nb, V) and interstitial (C, N) impurities in paramagnetic face-centered cubic Fe and obtain results that are in agreement with available experimental data. It is found that both interstitial and substitutional atoms may favor the local magnetic polarization of the Fe host around the impurities by decreasing the potential energy of the system. The possibility of a formation of predominantly ferromagnetic Fe clusters around carbon in the temperature range of overcooled austenite is discussed.
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subjects Carbon
Condensed matter
Disorders
Enthalpy
Ferromagnetism
Impurities
Interstitials
Mathematical models
title Ab initio calculation of the solution enthalpies of substitutional and interstitial impurities in paramagnetic fcc Fe
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