Spin Hall effect in the high-resistivity high-entropy alloy AlCrMoW
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908587488444416 |
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| author | Yadav, Jyoti Janus, Felix Schneider, Tiago de Oliveira Sharma, Shalini Schröter, Daniel Meinert, Markus |
| author_facet | Yadav, Jyoti Janus, Felix Schneider, Tiago de Oliveira Sharma, Shalini Schröter, Daniel Meinert, Markus |
| contents | We study thin films of the high-entropy alloy system Al$_{x}$(CrMoW)$_{1-x}$, grown on Ta seed layers by magnetron co-sputtering. Between $x=0.2$ and $x=0.6$, a resistivity larger than 100$μΩ$cm is achieved, with a peak of 180$μΩ$cm at $x=0.5$. Around the stoichiometric composition AlCrMoW, the alloy forms a bcc solid solution. The harmonic Hall method was used to characterize the spin Hall angle of the alloy series, where a maximum spin Hall angle of $θ= -0.12 \pm 0.01$ is observed for $x=0.25$. The implied spin Hall conductivity is $σ_\mathrm{SH} \approx -72\,000 \, \hbar/(2e)$\,S/m. The experimental results show excellent agreement with density functional theory calculations, which show similar trends and values. The results demonstrate that high-entropy alloys with a main-group element component can form a simple crystal structure and show high resistivity. This suggests that a whole new class of materials for spin Hall device engineering is available with simple methods. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_09835 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin Hall effect in the high-resistivity high-entropy alloy AlCrMoW Yadav, Jyoti Janus, Felix Schneider, Tiago de Oliveira Sharma, Shalini Schröter, Daniel Meinert, Markus Materials Science We study thin films of the high-entropy alloy system Al$_{x}$(CrMoW)$_{1-x}$, grown on Ta seed layers by magnetron co-sputtering. Between $x=0.2$ and $x=0.6$, a resistivity larger than 100$μΩ$cm is achieved, with a peak of 180$μΩ$cm at $x=0.5$. Around the stoichiometric composition AlCrMoW, the alloy forms a bcc solid solution. The harmonic Hall method was used to characterize the spin Hall angle of the alloy series, where a maximum spin Hall angle of $θ= -0.12 \pm 0.01$ is observed for $x=0.25$. The implied spin Hall conductivity is $σ_\mathrm{SH} \approx -72\,000 \, \hbar/(2e)$\,S/m. The experimental results show excellent agreement with density functional theory calculations, which show similar trends and values. The results demonstrate that high-entropy alloys with a main-group element component can form a simple crystal structure and show high resistivity. This suggests that a whole new class of materials for spin Hall device engineering is available with simple methods. |
| title | Spin Hall effect in the high-resistivity high-entropy alloy AlCrMoW |
| topic | Materials Science |
| url | https://arxiv.org/abs/2510.09835 |