Spin caloric effects in antiferromagnets assisted by an external spin current
Gomonay O, Yamamoto K, Sinova J (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 51
Article Number: 264004
Journal Issue: 26
Abstract
Searching for novel spin caloric effects in antiferromagnets, we study the properties of thermally activated magnons in the presence of an external spin current and temperature gradient. We predict the spin Peltier effect - generation of a heat flux by spin accumulation - in an antiferromagnetic insulator with cubic or uniaxial magnetic symmetry. This effect is related to the spin-current induced splitting of the relaxation times of the magnons with the opposite spin direction. We show that the Peltier effect can trigger antiferromagnetic domain wall motion with a force whose value grows with the temperature of a sample. At a temperature larger than the energy of the low-frequency magnons, this force is much larger than the force caused by direct spin transfer between the spin current and the domain wall. We also demonstrate that the external spin current can induce the magnon spin Seebeck effect. The corresponding Seebeck coefficient is controlled by the current density. These spin-current assisted caloric effects open new ways for the manipulation of the magnetic states in antiferromagnets.
Involved external institutions
Germany (DE)How to cite
APA:
Gomonay, O., Yamamoto, K., & Sinova, J. (2018). Spin caloric effects in antiferromagnets assisted by an external spin current. Journal of Physics D: Applied Physics, 51(26). https://doi.org/10.1088/1361-6463/aac56b
MLA:
Gomonay, Olena, Kei Yamamoto, and Jairo Sinova. "Spin caloric effects in antiferromagnets assisted by an external spin current." Journal of Physics D: Applied Physics 51.26 (2018).
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