Competing magnetic correlations and uniaxial anisotropy in (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ single crystals
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arXiv
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| Format: | Preprint |
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2024
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| author | Shiotani, Taiki Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki |
| author_facet | Shiotani, Taiki Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki |
| contents | We have succeeded for the first time in synthesizing single crystals of nanolaminated borides (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ in the entire Fe-Mn composition range using the Al self-flux method, and have established $T$-$x$, $H$-$T$ and three-dimensional $H$-$T$-$x$ magnetic phase diagrams from the results of magnetization measurements. The ferromagnetic correlation of Fe$_2$AlB$_2$ is weakened with the Mn substitution, whereas the antiferromagnetic correlation of Mn$_2$AlB$_2$ is enhanced with the Fe up to $x=0.65$. The spin direction in the magnetic ordered states changes from the $a$ to the $b$ axis with increasing Mn concentration and temperature. At $x$ = 0.31-0.46, there are three magnetic phases; ferromagnetic, antiferromganetic, and intermediate phases in between. At $x$ = 0.65 and 0.74, a spin-flop-like metamagnetic transition was observed at a finite field parallel to the spin direction. These observations indicate that in (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ the ferromagnetic and antiferromagnetic correlations coexist and the uniaxial magnetic anisotropy competes between the $a$ and $b$ axes. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_03415 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Competing magnetic correlations and uniaxial anisotropy in (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ single crystals Shiotani, Taiki Waki, Takeshi Tabata, Yoshikazu Nakamura, Hiroyuki Materials Science Strongly Correlated Electrons We have succeeded for the first time in synthesizing single crystals of nanolaminated borides (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ in the entire Fe-Mn composition range using the Al self-flux method, and have established $T$-$x$, $H$-$T$ and three-dimensional $H$-$T$-$x$ magnetic phase diagrams from the results of magnetization measurements. The ferromagnetic correlation of Fe$_2$AlB$_2$ is weakened with the Mn substitution, whereas the antiferromagnetic correlation of Mn$_2$AlB$_2$ is enhanced with the Fe up to $x=0.65$. The spin direction in the magnetic ordered states changes from the $a$ to the $b$ axis with increasing Mn concentration and temperature. At $x$ = 0.31-0.46, there are three magnetic phases; ferromagnetic, antiferromganetic, and intermediate phases in between. At $x$ = 0.65 and 0.74, a spin-flop-like metamagnetic transition was observed at a finite field parallel to the spin direction. These observations indicate that in (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ the ferromagnetic and antiferromagnetic correlations coexist and the uniaxial magnetic anisotropy competes between the $a$ and $b$ axes. |
| title | Competing magnetic correlations and uniaxial anisotropy in (Fe$_{1-x}$Mn$_{x}$)$_2$AlB$_2$ single crystals |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2403.03415 |