# Iron nitride Fe16N2: intrinsic properties, synthesis, stability and bulk magnets

https://mdr.nims.go.jp/datasets/258f442c-4320-4a25-8db2-3c0739528d0f

## File

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- [(abstract) P2-69_Figure1.jpeg](https://mdr.nims.go.jp/filesets/d379e954-ce3f-4764-82d5-400f8c9d9c55/download) ([Detail](https://mdr.nims.go.jp/filesets/d379e954-ce3f-4764-82d5-400f8c9d9c55.md))

## Id

258f442c-4320-4a25-8db2-3c0739528d0f

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-08-13T09:03:21.797215Z

## Updated at

2025-08-20T03:31:13.040925Z

## Published at

2025-08-20T03:19:22.605722Z

## Doi

https://doi.org/10.48505/nims.5649

## First published url



## Date published



## Recorded date published



## Resource type

conference_poster

## Manuscript type

na

## Collection

- id: d28f086a-61aa-4bc7-bcae-5a1078cbc6c7
  identifier: https://mdr.nims.go.jp/pid/d28f086a-61aa-4bc7-bcae-5a1078cbc6c7
  title: The 28th International Workshop on Rare Earth and Future Permanent Magnets
    and Their Applications (REPM2025)

## Title

- title: 'Iron nitride Fe16N2: intrinsic properties, synthesis, stability and bulk
    magnets'
  title_type: original
  lang: en

## Description

- description: "The fascinating phase diagram of iron-nitrogen provides a variety
    of interesting materials with their magnetic properties tunable in a broad range
    depending on the nitrogen content. As expected, magnetism correlates with the
    iron amount, starting from nonmagnetic FeN to ferromagnetic Fe4N with high magnetization
    and spin polarization and even further to Fe8N. Perhaps the most attention is
    attracted by the ordered tetragonal superstructure α′′-Fe16N2 due to its unique
    combination of high saturation magnetization with enhanced magnetocrystalline
    anisotropy. Unfortunately, the α′′- Fe16N2 phase is metastable and therefore hard
    to produce in phase-pure form. Moreover, decomposition already below 200 °C [1]
    hinders large scale production of bulk fully dense magnets using conventional
    routes. Nevertheless, it has been studied for multiple potential applications,
    such as rare-earth-free permanent magnets, two-phase nanocomposite magnets [2]
    as well as biomedical applications [3].In this contribution we provide a comprehensive
    overview and assessment of the potential magnet performance based on our own experimental
    results as well as study of the available scientific literature and patents. We
    report synthesis of α′′-Fe16N2 nanoparticles followed by production of bulk samples
    by low-temperature consolidation. Magnetic properties and stability are discussed
    in the context of possible application in permanent magnets.\r\n\r\nReferences\r\n[1]
    I. Dirba et al., Acta Mater., vol. 123, pp. 214–222, 2017.\r\n[2] I. Dirba et
    al., J. Magn. Magn. Mater., vol. 518, 2021.\r\n[3] I. Dirba et al., J. Phys. D.
    Appl. Phys., vol. 56, no. 2, p. 025001, Jan. 2023."
  description_type: abstract
  lang: en

## Creator

- name: Imants Dirba
  role: author
  organization: Functional Materials, Institute of Materials Science, Technical University
    of Darmstadt, 64287 Darmstadt, Germany
- name: Jürgen Gassmann
  role: author
  organization: Fraunhofer Research Institution for Materials Recycling and Resource
    Strategies IWKS, Aschaffenburger Str. 121, 63457 Hanau, Germany
- name: Oliver Diehl
  role: author
  organization: Fraunhofer Research Institution for Materials Recycling and Resource
    Strategies IWKS, Aschaffenburger Str. 121, 63457 Hanau, Germany
- name: Oliver Gutfleisch
  role: author
  organization: Functional Materials, Institute of Materials Science, Technical University
    of Darmstadt, 64287 Darmstadt, Germany

## Contact agent



## Publisher

organization: National Institute for Materials Science (NIMS)

## Managing organization



## Keyword

- subject: REPM2025
  schema: not_defined
- subject: Iron nitride
  schema: not_defined
- subject: Fe16N2
  schema: not_defined
- subject: rare earth free
  schema: not_defined
- subject: permanent magnet
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: REPM2025
start_date: 2025-07-27
end_date: 2025-07-31
identifier: https://www.nims.go.jp/mmu/repm2025/

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## Specimen



## Chemical composition



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## Fileset

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  filename: REPM2025_P2-69_Dirba.pdf
  content_type: application/pdf
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  md5: a649d5123cffd7b30c8c9c8966f1f80f
- id: d379e954-ce3f-4764-82d5-400f8c9d9c55
  filename: "(abstract) P2-69_Figure1.jpeg"
  content_type: image/jpeg
  size: 25778
  md5: aac0fb0141a65b565c7813fb8a3364ba

## Thumbnail

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filename: REPM2025_P2-69_Dirba.pdf