Nanoscale Metastable 𝓔Fe3N Ferromagnetic Materials by Self-Sustained Reactions



A single-step method for the preparation of metastable ε-Fe3N nanoparticles by combustion of reactive gels containing iron nitrate (Fe(NO3)3) and hexamethylene-tetramine (C6H12N4) in an inert atmosphere is reported. The results of Fourier transform infrared spectroscopy (FTIR) and thermal analysis coupled with dynamic mass spectrometry revealed that the exothermic decomposition of a coordination complex formed between Fe(NO3)3 and HMTA is responsible for the formation of ε-Fe3N nanoscale particles with sizes of 5−15 nm. The magnetic properties between 5 and 350 K are characterized using a superconducting quantum interference device (SQUID) magnetometer, revealing a ferromag- netic behavior with a low-temperature magnetic moment of 1.09 μB/Fe, high room temperature saturation magnetization (∼80 emu/g), and low remanent magnetization (∼15 emu/g). The obtained value for the Curie temperature of ∼522 K is close to that (∼575 K) for bulk ε-Fe3N reported in the literature.


Attribute NameValues
  • Alexander Mukasyan

  • Sergey Roslyakov

  • Joshua Pauls

  • Leighton Gallington

  • Tatuama Pr;pva

  • Xinyu Liu

  • Margaret Dobrowolska

  • Jacek Furdyna

  • Khachatur Manukyan

Journal or Work Title
  • Inorganic Chemistry

  • 58

First Page
  • 5583

Last Page
  • 5592

  • 0020-1669

Publication Date
  • 2019-05

  • Titan TEM

  • Magellan SEM

  • American Chemical Society

Date Created
  • 2019-08-22

  • English

Departments and Units
Record Visibility Public
Content License
  • All rights reserved

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