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Consequences on the electronic structure and hyperfine of iridium–iron alloys when transformed into substituted iron iridium nitrides

Published online by Cambridge University Press:  01 May 2014

A.V. dos Santos
A.V. dos Santos*
Affiliation:
Departamento de Ciências Exatas e da Terra, Universidade Regional Integrada do Alto Uruguai e das Missões, Santo Ângelo, Rio Grande do Sul, Brazil
*
a)Address all correspondence to this author. e-mail: vandao@urisan.tche.br
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Abstract

For years, substituted iron nitrides have been studied by various types of approaches: physical, chemical, and materials engineering, both experimental and theoretical. More recently, substituted iron nitrides have been studied by theoretical models for calculation of electronic structure, presenting the advantage of being economically viable. The properties of these compounds have potential application not only as a recording material but also in other areas: as resistance to corrosion and wear. The changes occurred in the alloys when transformed into nitrides still require further studies. Thus, the electronic and magnetic structure of IrFe3 and Ir3Fe alloys and the changes caused in their ground state properties when the nitrogen atoms were included in their stoichiometry, turning them into substituted iron nitrides type Ir3FeN and IrFe3N, will be investigated in this study. The electronic structure of these compounds was modeled using the linearized augmented plane waves (LAPW), an augmented plane wave (APW – method of Slater) modification. The following methodology was used in this study: the cohesive energy for steady state was calculated and then the ground state properties, such as charge transfer, magnetic moment, hyperfine properties, and the density of states, were obtained. The ground state properties are also assessed from the pressure variation experienced by these compounds, that way, the induced changes in the alloys caused by introducing the nitrogen atom are obtained. This study may assist in obtaining new and better nitrides.

Keywords

LAPWnitridesenergy of formationcohesive energyelectronic structuremagnetic structure
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 8 , 28 April 2014 , pp. 959 - 974
Copyright
Copyright © Materials Research Society 2014 

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