Unusual strong ferromagnetism in site-ordered cubic Laves phase compound LuInCo$_4$ with Co-pyrochlore lattice
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929469472636928 |
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| author | Shiotani, Taiki Ohta, Hiroto Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki |
| author_facet | Shiotani, Taiki Ohta, Hiroto Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki |
| contents | We have successfully synthesized single crystals of the site-ordered cubic (C15b) Laves phase compound LuInCo$_4$ with the Co-pyrochlore sublattice for the first time. LuInCo$_4$ undergoes a ferromagnetic transition at 306 K and has a saturation moment of 3.43 $μ_{\rm{B}}$/f.u. at 5 K. The strongly ferromagnetic nature was verified by DFT calculations, suggesting that Co-3$d$ flat bands near the Fermi level induce the spin polarization. The magnetization is isotropic above $\sim$100 K, saturates most easily in the [100] direction at low temperatures. In this anisotropic ferromagnetic state, the magnetization undergoes a metamagnetic transition in the [111] direction. Our results suggest that LuInCo$_4$ is a new strong but unusual itinerant electron ferromagnet, which deserves further study as a pyrochlore metal. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12166 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unusual strong ferromagnetism in site-ordered cubic Laves phase compound LuInCo$_4$ with Co-pyrochlore lattice Shiotani, Taiki Ohta, Hiroto Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki Strongly Correlated Electrons Materials Science We have successfully synthesized single crystals of the site-ordered cubic (C15b) Laves phase compound LuInCo$_4$ with the Co-pyrochlore sublattice for the first time. LuInCo$_4$ undergoes a ferromagnetic transition at 306 K and has a saturation moment of 3.43 $μ_{\rm{B}}$/f.u. at 5 K. The strongly ferromagnetic nature was verified by DFT calculations, suggesting that Co-3$d$ flat bands near the Fermi level induce the spin polarization. The magnetization is isotropic above $\sim$100 K, saturates most easily in the [100] direction at low temperatures. In this anisotropic ferromagnetic state, the magnetization undergoes a metamagnetic transition in the [111] direction. Our results suggest that LuInCo$_4$ is a new strong but unusual itinerant electron ferromagnet, which deserves further study as a pyrochlore metal. |
| title | Unusual strong ferromagnetism in site-ordered cubic Laves phase compound LuInCo$_4$ with Co-pyrochlore lattice |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2408.12166 |