中国物理B ›› 2025, Vol. 34 ›› Issue (6): 68301-068301.doi: 10.1088/1674-1056/adca1c

所属专题: SPECIAL TOPIC — Structures and properties of materials under high pressure

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Iron nitrides: High-pressure synthesis, nitrogen disordering and local magnetic moment

Yu Tao(陶雨) and Li Lei(雷力)†   

  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 China
  • 收稿日期:2025-02-28 修回日期:2025-04-01 接受日期:2025-04-08 出版日期:2025-05-16 发布日期:2025-05-16
  • 通讯作者: Li Lei E-mail:lei@scu.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 12374013 and U2030107) and the Fundamental Research Funds for the Central University (Grant No. 2020SCUNL107). The high-pressure in-situ imaging experiments were conducted at BL12SW of SSRF (Proposal No. 2024-SSRF-PT-505499).

Iron nitrides: High-pressure synthesis, nitrogen disordering and local magnetic moment

Yu Tao(陶雨) and Li Lei(雷力)†   

  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 China
  • Received:2025-02-28 Revised:2025-04-01 Accepted:2025-04-08 Online:2025-05-16 Published:2025-05-16
  • Contact: Li Lei E-mail:lei@scu.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 12374013 and U2030107) and the Fundamental Research Funds for the Central University (Grant No. 2020SCUNL107). The high-pressure in-situ imaging experiments were conducted at BL12SW of SSRF (Proposal No. 2024-SSRF-PT-505499).

摘要: Iron nitride (Fe$_{x}$N$_{y}$) is a promising candidate for the next generation of ferromagnetic materials. However, synthesizing high-quality bulk iron nitride with tuned structure and magnetic properties remains a challenge. Currently, experimental and theoretical results regarding the magnetic property of iron nitrides remain controversial. With the recent advancements in high-pressure technology, new synthetic pathways to iron nitrides have been proposed. High-pressure synthesis technology provides multidimensional possibilities for tuning the structure and magnetic properties of iron nitrides. This review summarizes recent progress in high-pressure synthesis of iron nitrides, especially the high-pressure solid-state metathesis reaction synthesis (HSM). We have summarized the reaction characteristics of HSM. The HSM reaction exhibits vector synthesis characteristics and promotes nitrogen disorder diffusion at high temperature. Due to this, the HSM reaction can achieve the synthesis of multinary iron-based metal nitrides and regulate the local magnetic moments. It serves as a powerful means for tuning the structure and magnetic properties of iron nitrides. Taking advantage of neutron diffraction in characterizing local magnetic moment and nitrogen disorder in iron nitrides, the relationship between iron local magnetic moment and nitrogen content has been elucidated. Moreover, the development of high-pressure in-situ imaging technology based on large-volume press allows the real-time observation of HSM reaction process. In this review, we also report our latest experiments on neutron diffraction and high-pressure in-situ image for the study of iron nitrides.

关键词: iron nitride, high-pressure synthesis

Abstract: Iron nitride (Fe$_{x}$N$_{y}$) is a promising candidate for the next generation of ferromagnetic materials. However, synthesizing high-quality bulk iron nitride with tuned structure and magnetic properties remains a challenge. Currently, experimental and theoretical results regarding the magnetic property of iron nitrides remain controversial. With the recent advancements in high-pressure technology, new synthetic pathways to iron nitrides have been proposed. High-pressure synthesis technology provides multidimensional possibilities for tuning the structure and magnetic properties of iron nitrides. This review summarizes recent progress in high-pressure synthesis of iron nitrides, especially the high-pressure solid-state metathesis reaction synthesis (HSM). We have summarized the reaction characteristics of HSM. The HSM reaction exhibits vector synthesis characteristics and promotes nitrogen disorder diffusion at high temperature. Due to this, the HSM reaction can achieve the synthesis of multinary iron-based metal nitrides and regulate the local magnetic moments. It serves as a powerful means for tuning the structure and magnetic properties of iron nitrides. Taking advantage of neutron diffraction in characterizing local magnetic moment and nitrogen disorder in iron nitrides, the relationship between iron local magnetic moment and nitrogen content has been elucidated. Moreover, the development of high-pressure in-situ imaging technology based on large-volume press allows the real-time observation of HSM reaction process. In this review, we also report our latest experiments on neutron diffraction and high-pressure in-situ image for the study of iron nitrides.

Key words: iron nitride, high-pressure synthesis

中图分类号:  (X-ray and neutron scattering)

  • 83.85.Hf
82.40.Fp (Shock wave initiated reactions, high-pressure chemistry) 77.84.Bw (Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.) 75.20.Hr (Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)