Nanoscale Metastable ε-Fe3N Ferromagnetic Materials by Self-Sustained Reactions | Zendy

Alexander S. Mukasyan | Zendy; Sergey Roslyakov | Zendy; Joshua M. Pauls | Zendy; Leighanne C. Gallington | Zendy; Tatyana Orlova | Zendy; Xinyu Liu | Zendy; M. Dobrowolska | Zendy; J. K. Furdyna | Zendy; Khachatur V. Manukyan | Zendy

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Nanoscale Metastable ε-Fe₃N Ferromagnetic Materials by Self-Sustained Reactions

Author(s) -

Alexander S. Mukasyan,

Sergey Roslyakov,

Joshua M. Pauls,

Leighanne C. Gallington,

Tatyana Orlova,

Xinyu Liu,

M. Dobrowolska,

J. K. Furdyna,

Khachatur V. Manukyan

Publication year - 2019

Publication title -

inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 233

eISSN - 1520-510X

pISSN - 0020-1669

DOI - 10.1021/acs.inorgchem.8b03553

Subject(s) - chemistry , analytical chemistry (journal) , squid , ferromagnetism , magnetization , hexamethylenetetramine , metastability , fourier transform infrared spectroscopy , thermal decomposition , curie temperature , magnetometer , chemical engineering , condensed matter physics , organic chemistry , magnetic field , ecology , physics , quantum mechanics , engineering , biology

A single-step method for the preparation of metastable ε-Fe 3 N nanoparticles by combustion of reactive gels containing iron nitrate (Fe(NO 3 ) 3 ) and hexamethylenetetramine (C 6 H 12 N 4 ) 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(NO 3 ) 3 and HMTA is responsible for the formation of ε-Fe 3 N 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 ferromagnetic behavior with a low-temperature magnetic moment of 1.09 μ B /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-Fe 3 N reported in the literature.

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