Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures

•Development of a versatile method for characterizing high-temperature dependence of spin Hall angles.•Investigation of high-temperature behavior of the spin Hall effect in Pt.•Characterization of the Curie temperature of 3 nm-CoFeB at a device scale. We report on current-induced ferromagnetic reson...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-09, Vol.485, p.304-307
Main Authors: Phu, P., Yamanoi, K., Ohnishi, K., Hyodo, J., Rogdakis, K., Yamazaki, Y., Kimura, T., Kurebayashi, H.
Format: Article
Language:English
Subjects:
Bolometers
Curie temperature
Electromagnetism
Ferromagnetic resonance
Ferromagnetism
Glass substrates
Hall effect
High-temperature-measurement
Magnetisation dynamics
Magnetism
Ohmic dissipation
Resistance heating
Spin-Hall-angle
Spin-transfer-torque
Temperature sensors
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Summary:•Development of a versatile method for characterizing high-temperature dependence of spin Hall angles.•Investigation of high-temperature behavior of the spin Hall effect in Pt.•Characterization of the Curie temperature of 3 nm-CoFeB at a device scale. 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.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.04.070