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Mn4N films with a maximum degree of order of nitrogen (S) were fabricated under three different substrate temperatures (Tsub), and the dominant factors were investigated for tuning the magnetic coercivity (Hc) in the films. It was revealed that Hc was strongly modulated from 10 kOe to 7.5 kOe for Tsub from 400 to 500 degree C, whereas the S, perpendicular magnetic anisotropy (PMA), and transport properties did not change. The number of dislocations and in-plane grain size (D) increased, whereas the residual strain decreased with increasing Tsub. Thus, we concluded that the Hc of the Mn4N film with maximum S is sensitive to the variation in dislocations, which are modulated by Tsub. Because Hc is linked to thermal stability and working power consumption, tunable Hc is an attractive phenomenon from the perspective of magnetic and spintronic devices using ferrimagnetic Mn4N films with high PMA and low saturation magnetization.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Mn4N

Date published: 2022-06-23

Publisher: Elsevier BV

Journal:

• JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (ISSN: 03048853) vol. 560 169642

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1016/j.jmmm.2022.169642

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Updated at: 2024-01-05 22:12:24 +0900

Published on MDR: 2025-06-23 08:20:00 +0900