Report
Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures
| العنوان: | Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures |
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| المؤلفون: | Müller, Manuel, Liensberger, Lukas, Flacke, Luis, Huebl, Hans, Kamra, Akashdeep, Belzig, Wolfgang, Gross, Rudolf, Weiler, Mathias, Althammer, Matthias |
| المصدر: | Phys. Rev. Lett. 126, 087201 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We investigate the injection of quasiparticle spin currents into a superconductor via spin pumping from an adjacent FM layer.$\;$To this end, we use NbN/\ch{Ni80Fe20}(Py)-heterostructures with a Pt spin sink layer and excite ferromagnetic resonance in the Py-layer by placing the samples onto a coplanar waveguide (CPW). A phase sensitive detection of the microwave transmission signal is used to quantitatively extract the inductive coupling strength between sample and CPW, interpreted in terms of inverse current-induced torques, in our heterostructures as a function of temperature. Below the superconducting transition temperature $T_{\mathrm{c}}$, we observe a suppression of the damping-like torque generated in the Pt layer by the inverse spin Hall effect (iSHE), which can be understood by the changes in spin current transport in the superconducting NbN-layer. Moreover, below $T_{\mathrm{c}}$ we find a large field-like current-induced torque. Comment: 4 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.087201 |
| URL الوصول: | http://arxiv.org/abs/2007.15569 |
| رقم الانضمام: | edsarx.2007.15569 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.126.087201 |
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