Journal
JETP LETTERS
Volume 101, Issue 6, Pages 371-375Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0021364015060090
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The parameters of equations of state of stoichiometric and nonstoichiometric phases of the gamma'-Fe4N, E >-Fe3N0.75, E >-Fe3N, E >-Fe3N1.25, and E >-Fe3N1.5 iron nitrides in a pressure range up to 500 GPa have been determined using ab initio calculations. The points of the sharp drop and disappearance of the magnetic moment on iron atoms have been found. It has been shown that certain changes in the magnetic moment are accompanied by a change in the volume of a unit cell of the nitrides. The calculated parameters of equations of state demonstrate that the compressibility of both magnetic and nonmagnetic iron nitrides decreases monotonically with an increase in the content of nitrogen.
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