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arXiv 2109.00293cond-mat.mtrl-sci
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反铁磁CoO的电开关|Pt穿过Néel温度

Electrical switching of antiferromagnetic CoO | Pt across the Néel temperature

M. J. Grzybowski, C. F. Schippers, M. E. Bal, K. Rubi, U. Zeitler, M. Foltyn, B. Koopmans, H. J. M. Swagten

摘要:

反铁磁自旋电子学中最重要的挑战之一是Néel矢量态的读出。在电开关实验中使用的高达10 $^8$ Acm $^{-2}$的高电流密度导致区分电信号的磁源和热源的困难。为了克服这个问题,我们提出了一个温度依赖性研究的横向电阻变化的开关实验与CoO| Pt器械。我们证明了提取的模式的自旋霍尔磁电阻的电流脉冲密度为$5 \times 10^7$ ACM $^{-2}$,是目前只低于内尔温度,并不遵循预期的热效应的趋势。这是令人信服的证据,证明信号的磁性起源,这是使用纯电子技术观察到的。我们通过在外部磁场中的补充实验证实了这些发现。这种方法可以允许确定用于切换反铁磁体的最佳条件,并且在没有成像技术可以应用于验证电信号的来源时非常有价值。

英文摘要:

One of the most important challenges in antiferromagnetic spintronics is the read-out of the Néel vector state. High current densities up to 10$^8$ Acm$^{-2}$ used in the electrical switching experiments cause notorious difficulty in distinguishing between magnetic and thermal origins of the electrical signals. To overcome this problem, we present a temperature dependence study of the transverse resistance changes in the switching experiment with CoO|Pt devices. We demonstrate the possibility to extract a pattern of spin Hall magnetoresistance for current pulses density of $5 \times 10^7$ Acm$^{-2}$ that is present only below the Néel temperature and does not follow a trend expected for thermal effects. This is the compelling evidence for the magnetic origin of the signal, which is observed using purely electrical techniques. We confirm these findings by complementary experiments in an external magnetic field. Such an approach can allow determining the optimal conditions for switching antiferromagnets and be very valuable when no imaging techniques can be applied to verify the origin of the electrical signal.

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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