[1] GRABKE H J.The role of nitrogen in the corrosion of iron and steels[J].ISIJ Int, 1996, 36(7):777-786.  doi: 10.2355/isijinternational.36.777
[2] WANG X, ZHENG W T, TIAN H W, et al.Growth, structural, and magnetic properties of iron nitride thin films deposited by dc magnetron sputtering[J].Appl Surf Sci, 2003, 220(1):30-39.
[3] MORISAKO A, MATSUMOTO M, NAOE M.Magnetic anisotropy and soft magnetism of iron nitride thin films prepared by facing-target sputtering[J].J Appl Phys, 1991, 69(8):5619-5621.  doi: 10.1063/1.347941
[4] NAGAKURA S, TANEHASHI K.Electronic structure of iron nitrides studied by electron diffraction.Ⅱ.ε-Fe2N and ζ-Fe2N[J].J Phys Soc Jpn, 1968, 25(3):840-846.  doi: 10.1143/JPSJ.25.840
[5] PANDA R N, GAJBHIYE N S.Magnetic properties of single domain ε-Fe3N synthesized by borohydride reduction route[J].J Appl Phys, 1997, 81(1):335-339.  doi: 10.1063/1.364115
[6] ATIQ S, KO H, SIDDIQI S A, et al.Effect of epitaxy and lattice mismatch on saturation magnetization of γ'-Fe4N thin films[J].Appl Phys Lett, 2008, 92(22):222-507.
[7] DIRBA I, KOMISSINSKIY P, GUTFLEISCH O, et al.Increased magnetic moment induced by lattice expansion from α-Fe to α'-Fe8N[J].J Appl Phys, 2015, 117(17):173-911.
[8] SIFKOVITS M, SMOLINSKI H, HELLWIG S, et al.Interplay of chemical bonding and magnetism in Fe4N, Fe3N and ζ-Fe2N[J].J Magn Magn Mater, 1999, 204(3):191-198.
[9] LEINEWEBER A, JACOBS H, HÜNING F, et al.ε-Fe3N:magnetic structure, magnetization and temperature dependent disorder of nitrogen[J].J Alloy Compd, 1999, 288(1/2):79-87.
[10] PANDA R N, GAJBHIYE N S.Magnetic properties of nanocrystalline γ'-Fe4N and ε-Fe3N synthesized by citrate route[J].IEEE T Magn, 1998, 34(2):542-548.  doi: 10.1109/20.661488
[11] MILAD I K, SMITH K J, WONG P C, et al.A comparison of bulk metal nitride catalysts for pyridine hydrodenitrogenation[J].Catal Lett, 1998, 52(1):113-119.
[12] GUO K, RAU D, TOFFOLETTI L, et al.Ternary metastable nitrides ε-Fe2TMN (TM=Co, Ni):high-pressure, high-temperature synthesis, crystal structure, thermal stability, and magnetic properties[J].Chem Mater, 2012, 24(23):4600-4606.  doi: 10.1021/cm3031297
[13] LEI L, YIN W, JIANG X, et al.Synthetic route to metal nitrides:high-pressure solid-state metathesis reaction[J].Inorg Chem, 2013, 52(23):13356-13362.  doi: 10.1021/ic4014834
[14] YIN W, LEI L, JIANG X, et al.High pressure synthesis and properties studies on spherical bulk ε-Fe3N[J].High Pressure Res, 2014, 34(3):317-326.  doi: 10.1080/08957959.2014.944910
[15] KOJIMA Y, OHFUJI H.Structure and stability of carbon nitride under high pressure and high temperature up to 125GPa and 3 000K[J].Diam Relat Mater, 2013, 39:1-7.  doi: 10.1016/j.diamond.2013.07.006
[16] OHFUJI H, YAMAMOTO M.EDS quantification of light elements using osmium surface coating[J].J Miner Petrol Sci, 2015, 110(4):189-195.  doi: 10.2465/jmps.141126
[17] HOHENBERG P, KOHN W.Inhomogeneous electron gas[J].Phys Rev B, 1964, 136(3):864-871.
[18] KOHN W, SHAM L J.Quantum density oscillations in an inhomogeneous electron gas[J].Phys Rev A, 1965, 137(3):1697-1705.
[19] PERDEW J P, BURKE K, ERNZERHOF M.Generalized gradient approximation made simple[J].Phys Rev Lett, 1996, 77(18):3865-3868.  doi: 10.1103/PhysRevLett.77.3865
[20] GIANNOZZI P, BARONI S, BONINI N, et al.Quantum espresso:a modular and open-source software project for quantum simulations of materials[J].J Phys Condens Mat, 2009, 21(39):395-502.
[21] GOTOU H, YAGI T, LIZUKA R, et al.Application of X-ray radiography to study the segregation process of iron from silicate under high pressure and high temperature[J].High Pressure Res, 2015, 35(2):130-138.  doi: 10.1080/08957959.2015.1028932