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Journal of Applied Mathematics
Volume 2015, Article ID 238730, 9 pages
http://dx.doi.org/10.1155/2015/238730
Research Article

Magnetic and Mechanical Properties of Deformed Iron Nitride -Fe4N

1Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan
2Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
3Department of Aircraft Engineering, Air Force Institute of Technology, Kaohsiung 82047, Taiwan
4Laboratory of Polymeric Composite Materials, ISPMS SB RAS, Tomsk 634021, Russia
5Laboratory of Physics of Surface Phenomena, ISPMS SB RAS, Tomsk 634021, Russia

Received 23 May 2015; Revised 19 July 2015; Accepted 26 July 2015

Academic Editor: Tao Liu

Copyright © 2015 Chin-Hsiang Cheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The present study is aimed at magnetic and mechanical properties of iron nitride (-Fe4N) with elastic deformation. Electronic structure and thermal properties of the iron nitride are also studied to have a comprehensive understanding of the characteristics of -Fe4N. This study is focused on the variation of the magnetic and the mechanical properties of iron nitride with a change in crystal size represented by lattice constant. As the lattice constant is altered with deformation, magnetic moment of Fe-II atoms is appreciably elevated, while that of Fe-I atoms is nearly unchanged. Dependence of the magnetic moment and the bulk modulus on the lattice constant is examined. Meanwhile, chemical bonds between Fe atoms and N atoms formed across the crystal have been visualized by delocalization of atomic charge density in electron density map, and thermodynamic properties, including entropy, enthalpy, free energy, and heat capacity, are evaluated.