Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N

Meinert M (2016)
Journal of Physics: Condensed Matter 28(5): 056006.

Journal Article | Published | English

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Abstract
The exchange interactions of Cr4N, Mn4N, Fe4N, Co4N, and Ni4N compounds with perovskite structure were calculated to obtain the Curie temperatures for these compounds from Monte Carlo calculations. Contrary to naive expectation, the exchange interactions vary markedly among these five compounds. In Fe4N, the intra-sublattice interaction of the Fe 3c atoms is strongly negative, leading to a significant reduction of the Curie temperature. The calculated Curie temperatures are 291 K (Cr4N), 710 K (Mn4N), 668 K (Fe4N), 827 K (Co4N), and 121 K (Ni4N), in good agreement with experimental observations where available. The much lower Curie temperature of Ni4N compared to fcc Ni is explained on the basis of the exchange interactions.
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Meinert M. Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N. Journal of Physics: Condensed Matter. 2016;28(5): 056006.
Meinert, M. (2016). Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N. Journal of Physics: Condensed Matter, 28(5): 056006.
Meinert, M. (2016). Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N. Journal of Physics: Condensed Matter 28:056006.
Meinert, M., 2016. Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N. Journal of Physics: Condensed Matter, 28(5): 056006.
M. Meinert, “Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N”, Journal of Physics: Condensed Matter, vol. 28, 2016, : 056006.
Meinert, M.: Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N. Journal of Physics: Condensed Matter. 28, : 056006 (2016).
Meinert, Markus. “Exchange interactions and Curie temperatures of the tetrametal nitrides Cr4N, Mn4N, Fe4N, Co4N, and Ni4N”. Journal of Physics: Condensed Matter 28.5 (2016): 056006.
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PMID: 26766873
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