Magnon Spin Current Modulation through Site-Specific Doping in a Compensated Iron Garnet
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866911093168799744 |
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| author | Francis, Anna Merin Murthykrishnan, P. B. S. Kolay, Ratnamay Nath, Ramesh Nair, Sunil |
| author_facet | Francis, Anna Merin Murthykrishnan, P. B. S. Kolay, Ratnamay Nath, Ramesh Nair, Sunil |
| contents | We report on the impact of manganese doping at the iron sites in Gadolinium Iron Garnet (GdIG, Gd$_{3}$Fe$_{5}$O$_{12}$), employing temperature-dependent spin Seebeck effect and ferromagnetic resonance measurements. Our findings reveal a clear shift in the magnetic compensation temperature ($T_{comp}$) in Mn-doped GdIG, with minimal changes observed in the magnetic and damping properties. Notably, the spin Seebeck signal strength was enhanced significantly with the Mn doping. This enhancement is attributed to an increased spin mixing conductance and modifications in the magnon spectra that strengthen exchange interactions, highlighting the material's potential for room-temperature spintronic applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_03378 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnon Spin Current Modulation through Site-Specific Doping in a Compensated Iron Garnet Francis, Anna Merin Murthykrishnan, P. B. S. Kolay, Ratnamay Nath, Ramesh Nair, Sunil Strongly Correlated Electrons Materials Science We report on the impact of manganese doping at the iron sites in Gadolinium Iron Garnet (GdIG, Gd$_{3}$Fe$_{5}$O$_{12}$), employing temperature-dependent spin Seebeck effect and ferromagnetic resonance measurements. Our findings reveal a clear shift in the magnetic compensation temperature ($T_{comp}$) in Mn-doped GdIG, with minimal changes observed in the magnetic and damping properties. Notably, the spin Seebeck signal strength was enhanced significantly with the Mn doping. This enhancement is attributed to an increased spin mixing conductance and modifications in the magnon spectra that strengthen exchange interactions, highlighting the material's potential for room-temperature spintronic applications. |
| title | Magnon Spin Current Modulation through Site-Specific Doping in a Compensated Iron Garnet |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2508.03378 |