Roles of elements V and N in tetragonally distorted Fe-Co-V-N films
Abstract Tetragonally distorted Fe-Co-V-N with a body-centred tetragonal (bct) structure has a high saturation magnetisation and a high magnetocrystalline anisotropy of ~ 1 MJ/m3 and is expected to be a new hard magnetic material. The effectiveness of the combined addition of the elements V and N fo...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-13671-3 |
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| author | Takashi Hasegawa Chihiro Murakami Kosuke Imamura Yuta Nakamura Mitsuru Ohtake Haruki Yamane |
| author_facet | Takashi Hasegawa Chihiro Murakami Kosuke Imamura Yuta Nakamura Mitsuru Ohtake Haruki Yamane |
| author_sort | Takashi Hasegawa |
| collection | DOAJ |
| description | Abstract Tetragonally distorted Fe-Co-V-N with a body-centred tetragonal (bct) structure has a high saturation magnetisation and a high magnetocrystalline anisotropy of ~ 1 MJ/m3 and is expected to be a new hard magnetic material. The effectiveness of the combined addition of the elements V and N for bct formation has been reported, but the mechanism remains unclear. In this study, the amounts of V and N in FeCo were varied systematically, and the optimal amounts were found to be approximately 20 at% V and 6 at% N. This optimal composition was also effective for the bct transformation, even in a 100-nm-thick film. The role of V in the bct transformation is assumed to be to lower the energy needed to change the lattice constant of FeCo and attract N. The role of N is also considered to extend the c-axis of the Fe-Co-V lattice, causing a bct transformation. |
| format | Article |
| id | doaj-art-58b2ad468b094dc7b29aea0369eb42dc |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-58b2ad468b094dc7b29aea0369eb42dc2025-08-20T03:45:52ZengNature PortfolioScientific Reports2045-23222025-08-011511810.1038/s41598-025-13671-3Roles of elements V and N in tetragonally distorted Fe-Co-V-N filmsTakashi Hasegawa0Chihiro Murakami1Kosuke Imamura2Yuta Nakamura3Mitsuru Ohtake4Haruki Yamane5Akita UniversityAkita UniversityYokohama National University Yokohama National University Yokohama National University Akita Industrial Technology Center Abstract Tetragonally distorted Fe-Co-V-N with a body-centred tetragonal (bct) structure has a high saturation magnetisation and a high magnetocrystalline anisotropy of ~ 1 MJ/m3 and is expected to be a new hard magnetic material. The effectiveness of the combined addition of the elements V and N for bct formation has been reported, but the mechanism remains unclear. In this study, the amounts of V and N in FeCo were varied systematically, and the optimal amounts were found to be approximately 20 at% V and 6 at% N. This optimal composition was also effective for the bct transformation, even in a 100-nm-thick film. The role of V in the bct transformation is assumed to be to lower the energy needed to change the lattice constant of FeCo and attract N. The role of N is also considered to extend the c-axis of the Fe-Co-V lattice, causing a bct transformation.https://doi.org/10.1038/s41598-025-13671-3Lattice distortionTetragonal distortionUniaxial magnetic anisotropyXRD |
| spellingShingle | Takashi Hasegawa Chihiro Murakami Kosuke Imamura Yuta Nakamura Mitsuru Ohtake Haruki Yamane Roles of elements V and N in tetragonally distorted Fe-Co-V-N films Scientific Reports Lattice distortion Tetragonal distortion Uniaxial magnetic anisotropy XRD |
| title | Roles of elements V and N in tetragonally distorted Fe-Co-V-N films |
| title_full | Roles of elements V and N in tetragonally distorted Fe-Co-V-N films |
| title_fullStr | Roles of elements V and N in tetragonally distorted Fe-Co-V-N films |
| title_full_unstemmed | Roles of elements V and N in tetragonally distorted Fe-Co-V-N films |
| title_short | Roles of elements V and N in tetragonally distorted Fe-Co-V-N films |
| title_sort | roles of elements v and n in tetragonally distorted fe co v n films |
| topic | Lattice distortion Tetragonal distortion Uniaxial magnetic anisotropy XRD |
| url | https://doi.org/10.1038/s41598-025-13671-3 |
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