Spin-Seebeck effects in Ni81Fe19/Pt films |
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| Authors: | K Uchida T Ota K Harii S Takahashi S Maekawa Y Fujikawa E Saitoh |
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| Institution: | 1. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;2. CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan;3. PRESTO, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan;1. Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology, Topi, Khyber Pakhtunkhwa, 23640 Pakistan;2. Department of Bioscience & Biotechnology, Sejong University, Seoul, 143-747 Republic of Korea;3. Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, Lahore, Pakistan;4. Centre for Advanced Studies in Physics, Government College University, Lahore 54000, Pakistan;5. Physics & Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;1. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany;2. Department of Physics, Tbilisi State University, Chavchavadze av. 3, 0128 Tbilisi, Georgia;3. Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany;4. Department of Physics, Rzeszów University of Technology, al. Powstanców Warszawy 6, 35-959 Rzeszów, Poland;5. Departamento de Física and CFIF, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;6. Faculty of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland;7. Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland;1. Fert Beijing Institute, School of Electronic and Information Engineering, BDBC, Beihang University, China;2. Institute of Physics, station 3, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne-EPFL, Switzerland;1. State key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China;2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;3. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;4. International Centre for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale (HFNL), University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China;5. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan |
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| Abstract: | The spin-Seebeck effect (SSE) converts a heat current into a spin current, a flow of spin angular momentum, and spin voltage, the driving force for nonequilibrium spin currents, in a ferromagnetic metal. In this study, the SSE in a ferromagnetic Ni81Fe19 film has been investigated by means of the inverse spin-Hall effect (ISHE) in a Pt film at room temperature. The experimental results measured in the Ni81Fe19/Pt system show that the sign of the thermally induced spin voltage is reversed between the higher- and lower-temperature ends of the Ni81Fe19 film. The ISHE in the Pt film allows us to detect the SSE signal with high sensitivity and to separate it from extrinsic thermoelectric effects. |
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