Local heat emission due to unidirectional spin-wave heat conveyer effect observed by lock-in thermography

Lock-in thermography measurements were performed to reveal heat source distribution induced by the unidirectional spin-wave heat conveyer effect (USHCE) of magnetostatic surface spin waves. When the magnetostatic surface spin waves are excited in an yttrium iron garnet slab, the lock-in thermography...

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Bibliographic Details
Published in:Applied physics letters 2021-05, Vol.118 (22)
Main Authors: Kainuma, Yuta, Iguchi, Ryo, Prananto, Dwi, Vasyuchka, Vitaliy I., Hillebrands, Burkard, An, Toshu, Uchida, Ken-ichi
Format: Article
Language:English
Subjects:
Air gaps
Applied physics
Dipole interactions
Emission
Heating
Magnetic materials
Magnons
Spin dynamics
Thermography
Yttrium
Yttrium-iron garnet
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Summary:Lock-in thermography measurements were performed to reveal heat source distribution induced by the unidirectional spin-wave heat conveyer effect (USHCE) of magnetostatic surface spin waves. When the magnetostatic surface spin waves are excited in an yttrium iron garnet slab, the lock-in thermography images show spatially biased sharp and complicated heating patterns, indicating the importance of edge spin-wave dynamics for USHCE. The accessibility to the local heat emission properties allows us to clarify a capability of remote heating realized by USHCE; it can transfer energy for heating even through a macro-scale air gap between two magnetic materials owing to the long-range dipole–dipole coupling.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0049491