Unidirectional spin-wave heat conveyer
Source abstract
Abstract
When energy is introduced into a region of matter, it heats up and the local temperature increases. This energy spontaneously diffuses away from the heated region. In general, heat should flow from warmer to cooler regions and it is not possible to externally change the direction of heat conduction. Here we show a magnetically controllable heat flow caused by a spin-wave current. The direction of the flow can be switched by applying a magnetic field. When microwave energy is applied to a region of ferrimagnetic Y3Fe5O12, an end of the magnet far from this region is found to be heated in a controlled manner and a negative temperature gradient towards it is formed. This is due to unidirectional energy transfer by the excitation of spin-wave modes without time-reversal symmetry and to the conversion of spin waves into heat. When a Y3Fe5O12 film with low damping coefficients is used, spin waves are observed to emit heat at the sample end up to 10 mm away from the excitation source. The magnetically controlled remote heating we observe is directly applicable to the fabrication of a heat-flow controller.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Physics of Superconductivity and Magnetism
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Johnson, M. & Silsbee, R. H. Thermodynamic analysis of interfacial transport and of the thermomagnetoelectric system. Phys. Rev. B 35, 4959–4972 (1987).10.1103/PhysRevB.35.4959 ↗
2. Bauer, G. E. W., MacDonald, A. H. & Maekawa, S. Spin caloritronics. Solid State Commun. 150, 459–460 (2010).10.1016/j.ssc.2010.01.022 ↗
3. Uchida, K. et al. Observation of the spin Seebeck effect. Nature 455, 778–781 (2008).10.1038/nature07321 ↗
4. Uchida, K. et al. Spin Seebeck insulator. Nature Mater. 9, 894–897 (2010).10.1038/nmat2856 ↗
5. Jaworski, C. M. et al. Observation of the spin-Seebeck effect in a ferromagnetic semiconductor. Nature Mater. 9, 898–903 (2010).10.1038/nmat2860 ↗
6. Yu, H., Granville, S., Yu, D. P. & Ansermet, J-Ph. Evidence for thermal spin-transfer torque. Phys. Rev. Lett. 104, 146601 (2010).10.1103/PhysRevLett.104.146601 ↗
7. Slachter, A., Bakker, F. L., Adam, J-P. & van Wees, B. J. Thermally driven spin injection from a ferromagnet into a non-magnetic metal. Nature Phys. 6, 879–882 (2010).10.1038/nphys1767 ↗
8. Maekawa, S., Valenzuela, S. O., Saitoh, E. & Kimura, T. Spin Current (Oxford Univ. Press, 2012).10.1093/acprof:oso/9780199600380.001.0001 ↗
9. Bauer, G. E. W., Bretzel, S., Brataas, A. & Tserkovnyak, Y. Nanoscale magnetic heat pumps and engines. Phys. Rev. B 81, 024427 (2010).10.1103/PhysRevB.81.024427 ↗
10. Padrón-Hernández, E., Azevedo, A. & Rezende, S. M. Amplification of spin waves by thermal spin-transfer torque. Phys. Rev. Lett. 107, 197203 (2011).10.1103/PhysRevLett.107.197203 ↗
11. Lu, L., Sun, Y., Jantz, M. & Wu, M. Control of ferromagnetic relaxation in magnetic thin films through thermally induced interfacial spin transfer. Phys. Rev. Lett. 108, 257202 (2012).10.1103/PhysRevLett.108.257202 ↗
12. Jungfleisch, M. B. et al. Heat-induced damping modification in yttrium iron garnet/platinum hetero-structures. Appl. Phys. Lett. 102, 062417 (2013).10.1063/1.4792701 ↗
13. Kajiwara, Y. et al. Transmission of electrical signals by spin-wave interconversion in a magnetic insulator. Nature 464, 262–266 (2010).10.1038/nature08876 ↗
14. Patton, C. E. Magnetic excitations in solids. Phys. Rep. 103, 251–315 (1984).10.1016/0370-1573(84)90023-1 ↗
15. Stancil, D. D. & Prabhakar, A. Spin Waves: Theory and Applications (Springer, 2009).
16. Damon, R. W. & Eshbach, J. R. Magnetostatic modes of a ferromagnet slab. J. Phys. Chem. Solids 19, 308–320 (1961).10.1016/0022-3697(61)90041-5 ↗
17. Tohyama, S. et al. New thermally isolated pixel structure for high resolution (640 × 480) uncooled infrared focal plane arrays. Opt. Eng. 45, 014001 (2006).10.1117/1.2151892 ↗
18. Uchida, K. et al. Long-range spin Seebeck effect and acoustic spin pumping. Nature Mater. 10, 737–741 (2011).10.1038/nmat3099 ↗
19. Schneider, T., Serga, A. A., Neumann, T., Hillebrands, B. & Kostylev, M. P. Phase reciprocity of spin-wave excitation by a microstrip antenna. Phys. Rev. B 77, 214411 (2008).10.1103/PhysRevB.77.214411 ↗
20. Serga, A. A., Chumak, A. V. & Hillebrands, B. YIG magnonics. J. Phys. D 43, 264002 (2010).10.1088/0022-3727/43/26/264002 ↗
21. Gurevich, A. G. & Melkov, G. A. Magnetization Oscillations and Waves (CRC, 1996).
22. Chumak, A. V. et al. Direct detection of magnon spin transport by the inverse spin Hall effect. Appl. Phys. Lett. 100, 082405 (2012).10.1063/1.3689787 ↗
23. Adachi, H., Ohe, J., Takahashi, S. & Maekawa, S. Linear-response theory of spin Seebeck effect in ferromagnetic insulators. Phys. Rev. B 83, 094410 (2011).10.1103/PhysRevB.83.094410 ↗
24. Adachi, H., Uchida, K., Saitoh, E., Ohe, J., Takahashi, S. & Maekawa, S. Gigantic enhancement of spin Seebeck effect by phonon drag. Appl. Phys. Lett. 97, 252506 (2011).10.1063/1.3529944 ↗
25. Adachi, H., Uchida, K., Saitoh, E. & Maekawa, S. Theory of the spin Seebeck effect. Rep. Prog. Phys. 76, 036501 (2013).10.1088/0034-4885/76/3/036501 ↗
26. Xiao, J., Bauer, G. E. W., Uchida, K., Saitoh, E. & Maekawa, S. Theory of magnon-driven spin Seebeck effect. Phys. Rev. B 81, 214418 (2010).10.1103/PhysRevB.81.214418 ↗
27. Uchida, K. et al. Observation of longitudinal spin-Seebeck effect in magnetic insulators. Appl. Phys. Lett. 97, 252506 (2010).10.1063/1.3529944 ↗
28. Jaworski, C. M. et al. Spin-Seebeck effect: A phonon driven spin distribution. Phys. Rev. Lett. 106, 186601 (2011).10.1103/PhysRevLett.106.186601 ↗
29. Maekawa, S. Concepts in Spin Electronics (Oxford Univ. Press, 2006).10.1093/acprof:oso/9780198568216.001.0001 ↗
30. Žutić, I., Fabian, J. & Das Sarma, S. Spintronics: Fundamentals and applications. Rev. Mod. Phys. 76, 323–410 (2004).10.1103/RevModPhys.76.323 ↗