Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures
Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures
复制标题
用于表征高温下自旋霍尔效应的测辐射热铁磁共振技术
DOI：
10.1016/j.jmmm.2019.04.070
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发表时间：
2019
影响因子：
2.7
通讯作者：
H. Kurebayashi
中科院分区：
文献类型：
--
作者：
P. Phu;K. Yamanoi;K. Ohnishi;J. Hyodo;K. Rogdakis;Y. Yamazaki;T. Kimura;H. Kurebayashi
本文报道了高温下利用电流感生铁磁共振技术研究自旋霍尔效应。将微波电流注入到生长在玻璃衬底上的图案化CoFeB/Pt双层中，同时通过自旋霍尔效应施加自旋转移扭矩，并且还引起焦耳加热，使得能够控制器件温度。我们通过使用器件本身作为局部温度传感器来测量器件温度。随着器件温度的升高，观察到CoFeB磁化强度明显降低，这使得我们可以估计CoFeB薄膜的居里温度为920 K。Pt的自旋霍尔角在300 K时为（1.72 ± 0.03）× 10− 2，在410 K时略微增加到（1.75 ± 0.02）× 10− 2。这种简单的方法可以广泛用于量化各种材料在高温下的自旋霍尔角。
We report on current-induced ferromagnetic resonance techniques to characterise spin-Hall effect at high temperatures. A microwave current was injected into a patterned CoFeB/Pt bi-layer grown on a glass substrate, simultaneously exerting spin-transfer torques through the spin-Hall effect and also causing Joule heating enabling the control of the device temperature. We measured the device temperature by using the device itself as a local temperature sensor. A clear reduction of CoFeB magnetisation was observed as the device temperature was increased allowing us to estimate the Curie temperature of our CoFeB film to be 920 K. The spin-Hall angle of Pt was quantified as (1.72 ± 0.03) × 10−2at 300 K and was slightly increased to (1.75 ± 0.02) × 10−2at 410 K. This simple method can be widely used for quantifying the spin-Hall angle of a large variety of materials at high temperatures.
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影响因子：
3.7
作者：
Morota, M.;Niimi, Y.;Otani, Y.
通讯作者：
Otani, Y.
影响因子：
8.6
作者：
Kimura, T.;Otani, Y.;Maekawa, S.
通讯作者：
Maekawa, S.
影响因子：
44.1
作者：
Sinova, Jairo;Valenzuela, Sergio O.;Jungwirth, T.
通讯作者：
Jungwirth, T.
影响因子：
41.2
作者：
Okamoto, N.;Kurebayashi, H.;Barnes, C. H. W.
通讯作者：
Barnes, C. H. W.