Langenfeld, S, Tshitoyan, V, Fang, Z et al. (3 more authors) (2016) Exchange magnon induced resistance asymmetry in permalloy spin-Hall oscillators. Applied Physics Letters, 108. p. 192402. ISSN 0003-6951
Abstract
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, AIP. This is an author produced version of a paper published in Applied Physics Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/I011668/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 May 2016 12:22 |
Last Modified: | 16 Jan 2018 14:49 |
Published Version: | http://dx.doi.org/10.1063/1.4948921 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/1.4948921 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99934 |