7Kim T K, Takahashi M. New magnetic material having ultrahigh magnetic moment[J]. Appl Phys Lett, 1972, 20(12) : 492 - 494.
8Yu Z Q, Zhang J R, Du Y W. Magnetic properties and preparation of Fe3N compound[J]. J Magn Magn Mater, 1996, 159:8 - 10.
9Wu X L, Zhong W, Tang N J, et al. Magnetic properties and thermal stability of nanocrystalline ε-Fe3N prepared by gas reduction-nitriding method[J]. J Alloys Compd, 2004, 385: 294- 297.
10Hua Z H, Deng Y, Li K N, et al. Low-density nanoporous iron foams synthesized by sol-gel autocombustion[J]. Nanoscale Res Lett, 2012, 7(1): 129-133.
