Phu, P;
Yamanoi, K;
Ohnishi, K;
Hyodo, J;
Rogdakis, K;
Yamazaki, Y;
Kimura, T;
(2019)
Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures.
Journal of Magnetism and Magnetic Materials
, 485
pp. 304-307.
10.1016/j.jmmm.2019.04.070.
Preview |
Text
Kurebayashi_Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures_AAM.pdf - Accepted Version Download (498kB) | Preview |
Abstract
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^{-2} at 300 K and was slightly increased to (1.75 ± 0.02) × 10^{-2} at 410 K. This simple method can be widely used for quantifying the spin-Hall angle of a large variety of materials at high temperatures.
| Type: | Article |
|---|---|
| Title: | Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jmmm.2019.04.070 |
| Publisher version: | https://doi.org/10.1016/j.jmmm.2019.04.070 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Magnetisation dynamics, Spin-transfer-torque, Spin-Hall-angle, High-temperature-measurement |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10077534 |
Archive Staff Only
 |
View Item |
