| Autor: |
Xu, Jinsong, He, Jiaming, Zhou, J. -S., Qu, Danru, Huang, Ssu-Yen, Chien, C. L. |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 129, 117202 (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.129.117202 |
| Popis: |
Spintronic phenomena to date have been established in magnets with collinear moments, where the spin injection through the spin Seebeck effect (SSE) is always along the out-of-plane direction. Here, we report the observation of a vector SSE in a noncollinear antiferromagnet (AF) LuFeO$_3$, where temperature gradient along the out-of-plane and also the in-plane directions can both inject a pure spin current and generate a voltage in the heavy metal via the inverse spin Hall effect (ISHE). We show that the thermovoltages are due to the magnetization from canted spins in LuFeO$_3$. Furthermore, in contrast to the challenges of generating, manipulating and detecting spin current in collinear AFs, the vector SSE in LuFeO$_3$ is readily viable in zero magnetic field and can be controlled by a small magnetic field of about 150 Oe at room temperature. The noncollinear AFs expand new realms for exploring spin phenomena and provide a new route to low-field antiferromagnetic spin caloritronics and magnonics. |
| Databáze: |
arXiv |
| Externí odkaz: |
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