Journal
PHYSICAL REVIEW B
Volume 90, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.174436
Keywords
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Funding
- NanoNextNL, a micro- and nanotechnology consortium of the Government of the Netherlands and 130 partners
- European Commission [256470-ITAMOSCINOM]
- Basque Government [BFI-2011-106]
- NanoLab NL
- Zernike Institute for Advanced Materials (Dieptestrategie program)
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The spin-Seebeck effect (SSE) in platinum (Pt) and tantalum (Ta) on yttrium iron garnet has been investigated by both externally heating the sample (using an on-chip Pt heater on top of the device) and by current-induced heating. For SSE measurements, external heating is the most common method to obtain clear signals. Here we show that also by current-induced heating it is possible to directly observe the SSE, separate from the also present spin-Hall magnetoresistance (SMR) signal, by using a lock-in detection technique. Using this measurement technique, the presence of additional second-order signals at low applied magnetic fields and high heating currents is revealed. These signals are caused by current-induced magnetic fields (Oersted fields) generated by the used ac current, resulting in dynamic SMR signals.
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