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Interstitial Fe-Cr alloys: tuning of magnetism by nanoscale structural control and by implantation of nonmagnetic atoms

Published online by Cambridge University Press:  05 April 2012

N. Pavlenko ,
N. Shcherbovskikh  and
Z.A. Duriagina
N. Pavlenko*
Affiliation:
Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, Svientsitsky Str. 1, 79011 Lviv, Ukraine
N. Shcherbovskikh
Affiliation:
Institute for Applied Mathematics and Fundamental Sciences, Lviv Technical University, Ustyianowycha Str. 10, 79013 Lviv, Ukraine
Z.A. Duriagina
Affiliation:
Institute for Applied Mathematics and Fundamental Sciences, Lviv Technical University, Ustyianowycha Str. 10, 79013 Lviv, Ukraine
*
ae-mail: [email protected]
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Abstract

Using the density functional theory, we perform a full atomic relaxation of the bulk ferrite with 12.5% concentration of monoatomic interstitial Cr periodically located at the edges of the bcc Feα cell. We show that structural relaxation in such artificially engineered alloys leads to significant atomic displacements and results in the formation of novel highly stable configurations with parallel chains of octahedrically arranged Fe. The enhanced magnetic polarization in the low-symmetry metallic state of this type of alloy can be externally controlled by additional inclusion of nonmagnetic impurities like nitrogen. We discuss possible applications of generated interstitial alloys in spintronic devices and propose to consider them as a basis of novel durable types of stainless steels.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 58 , Issue 1 , April 2012 , 10601
Copyright
© EDP Sciences, 2012

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