Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4948921
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Funding
- EPSRC [EP/M50693X/1, EP/L027151/1]
- ERC [648613]
- Hitachi research fellowship
- EPSRC [EP/L027151/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M50693X/1, 1367246, EP/L027151/1] Funding Source: researchfish
- European Research Council (ERC) [648613] Funding Source: European Research Council (ERC)
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We investigate magnetization dynamics in a spin-Hall oscillator using a direct current measurement as well as conventional microwave spectrum analysis. When the current applies an anti-damping spin-transfer torque, we observe a change in resistance which we ascribe mainly to the excitation of incoherent exchange magnons. A simple model is developed based on the reduction of the effective saturation magnetization, quantitatively explaining the data. The observed phenomena highlight the importance of exchange magnons on the operation of spin-Hall oscillators. Published by AIP Publishing.
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