Spin-wave propagation and transformation in a thermal gradient

Abstract

The influence of a thermal gradient on the propagation properties of externally excited dipolar spin waves in a magnetic insulator waveguide is investigated. It is shown that spin waves propagating towards a colder region along the magnetization direction continuously reduce their wavelength. The wavelength increase of a wave propagating into a hotter region was utilized to realize its decomposition in the partial waveguide modes which are reflected at different locations. This influence of temperature on spin-wave properties is mainly caused by a change in the saturation magnetization and yields promising opportunities for the manipulation of spin waves in spin-caloritronic applications.

4 pages, 4 figures

References in corpus (2)

• Spin Seebeck insulator
• Theory of magnon-driven spin Seebeck effect

Cited by in corpus (11)

• Magnonic crystals for data processing
• Magnon-phonon coupling unmasked: a direct measurement of magnon temperature
• Propagation of spin-waves packets in individual nano-sized yttrium iron garnet magnonic conduits
• Magnon-phonon interactions in magnon spintronics
• Adiabatic Control of Spin-Wave Propagation using Magnetisation Gradients
• Temperature dependent relaxation of dipole-exchange magnons in yttrium iron garnet films
• Evidence for a Magnetic Seebeck effect
• Time refraction of spin waves
• Local heat emission due to unidirectional spin-wave heat conveyer effect observed by lock-in thermography
• Damping of parametrically excited magnons in the presence of the longitudinal spin Seebeck effect
• Magnetic Nernst effect