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Enhanced magnetic properties and thermal stability of highly ordered epsilon-Fe3N1+x (-0.12 <= x <=-0.01) nanoparticles
Li, Yong; Pan, Desheng; Zhou, Yangtao; Kuang, Qifeng; Wang, Chinwei; Li, Bing; Zhang, Bingsen; Park, Jihoon; Li, Da; Choi, Chuljin; Zhang, Zhidong
2020-05-21
Source PublicationNANOSCALE
Volume12Issue:19Pages:10834-10841
Abstractepsilon-Iron nitrides with the general formula epsilon-Fe3N1+x (-0.40 < x < 0.48) have been widely studied due to their interesting magnetism. However, the phase diagram of the Fe-N binary system indicates the absence of monophasic epsilon-Fe3N1+x (x < 0) compounds that are stable below their synthetic temperatures. Here, epsilon-Fe3N1+x (-0.12 <= x <= -0.01) nanoparticles with excellent thermal stability and magnetic properties were synthesized by a simple chemical solution method. The epsilon-Fe3N1+x nanoparticles with space group P6(3)22 have excellent oxidation resistance due to a carbon shell with a thickness of 2-3 nm. NPD refinements suggest that the epsilon-Fe3N1+x nanoparticles possess a highly ordered arrangement of N atoms and their magnetic moments align parallel to the c axis. The Curie temperature (T-C) and room temperature saturation magnetization (M-S) increase with decreasing N content, which results in record-high T-C (632 K) and M-S (169.2 emu g(-1)) at x = -0.12, much higher than the magnetic properties of the corresponding bulk materials. The significant enhancements in the intrinsic magnetic properties and thermal stability of epsilon-Fe3N1+x are ascribed to chemically engineering the stoichiometry and N occupancy from the disordered to the ordered site.
DOI10.1039/d0nr02424d
WOS IDWOS:000537113200037
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155699
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Li, Yong,Pan, Desheng,Zhou, Yangtao,et al. Enhanced magnetic properties and thermal stability of highly ordered epsilon-Fe3N1+x (-0.12 <= x <=-0.01) nanoparticles[J]. NANOSCALE,2020,12(19):10834-10841.
APA Li, Yong.,Pan, Desheng.,Zhou, Yangtao.,Kuang, Qifeng.,Wang, Chinwei.,...&Zhang, Zhidong.(2020).Enhanced magnetic properties and thermal stability of highly ordered epsilon-Fe3N1+x (-0.12 <= x <=-0.01) nanoparticles.NANOSCALE,12(19),10834-10841.
MLA Li, Yong,et al."Enhanced magnetic properties and thermal stability of highly ordered epsilon-Fe3N1+x (-0.12 <= x <=-0.01) nanoparticles".NANOSCALE 12.19(2020):10834-10841.
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