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arXiv 2103.16872cond-mat.mes-hall
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倾斜反铁磁体中的室温反铁磁共振和反自旋霍尔电压

Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets

I. Boventer, H. T. Simensen, A. Anane, M. Kläui, A. Brataas, R. Lebrun

摘要:

我们从理论和实验上研究了具有Dzyaloshinskiii-Moriya相互作用的倾斜反铁磁体的共振所引起的自旋泵浦信号,并证明了它们可以产生容易观察到的反自旋霍尔电压.使用双层的赤铁矿/重金属作为模型系统,我们在室温下测量的反铁磁共振和相关的反自旋霍尔电压,大的共线反铁磁体。正如预期的相干自旋泵浦,我们观察到,反自旋霍尔电压的符号提供了直接的信息,通过比较赤铁矿,氧化铬和亚铁磁体钇铁石榴石推断的模式手性。我们的研究结果开辟了新的手段,产生和检测自旋电流在太赫兹频率的功能化反铁磁体与低阻尼和倾斜的时刻。

英文摘要:

We study theoretically and experimentally the spin pumping signals induced by the resonance of canted antiferromagnets with Dzyaloshinskii-Moriya interaction and demonstrate that they can generate easily observable inverse spin-Hall voltages. Using a bilayer of hematite/heavy metal as a model system, we measure at room temperature the antiferromagnetic resonance and an associated inverse spin-Hall voltage, as large as in collinear antiferromagnets. As expected for coherent spin-pumping, we observe that the sign of the inverse spin-Hall voltage provides direct information about the mode handedness as deduced by comparing hematite, chromium oxide and the ferrimagnet Yttrium-Iron Garnet. Our results open new means to generate and detect spin-currents at terahertz frequencies by functionalizing antiferromagnets with low damping and canted moments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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