Study of magnon-phonon non-equilibrium in a magnetic insulator-Thulium iron garnet

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dc.contributor.authorLee, Geun-Heeko
dc.contributor.authorLee, Taekhyeonko
dc.contributor.authorCao Van, Phuocko
dc.contributor.authorKim, Donghako
dc.contributor.authorSeo, Min-Kyoko
dc.contributor.authorJo, Younghunko
dc.contributor.authorJeong, Jong-Ryulko
dc.contributor.authorKim, Kab-Jinko
dc.date.accessioned2021-12-07T06:42:38Z-
dc.date.available2021-12-07T06:42:38Z-
dc.date.created2021-12-07-
dc.date.created2021-12-07-
dc.date.issued2021-10-
dc.identifier.citationAPPLIED PHYSICS LETTERS, v.119, no.15-
dc.identifier.issn0003-6951-
dc.identifier.urihttp://hdl.handle.net/10203/290114-
dc.description.abstractThe non-equilibrium state between magnons and phonons is the key to understand the spin-caloric phenomena. We developed a unique optical reflectometry technique to spatially resolve Kerr angle ( theta K) and optical reflectance ( R) in a magnetic insulator-thulium iron garnet (TmIG). The TmIG was subjected to a thermal gradient to estimate populations of thermally excited magnons and phonons through the variation of theta K and R. The results showed that the spatial gradient of theta K is different from that of R, indicating the non-equilibrium state between magnons and phonons. Particularly, the characteristic decay length of theta K was significantly influenced by the heating power and the magnetic field, suggesting non-linear magnon scattering in a high magnon density regime. Our work not only provides a scheme to investigate the spatial profiles of magnons and phonons but also reveals the magnon-phonon non-equilibrium in TmIG. Hence, this report will stimulate further studies based on magnon-phonon non-equilibrium such as a transverse spin Seebeck effect and Bose-Einstein condensation.-
dc.languageEnglish-
dc.publisherAIP Publishing-
dc.titleStudy of magnon-phonon non-equilibrium in a magnetic insulator-Thulium iron garnet-
dc.typeArticle-
dc.identifier.wosid000721694000015-
dc.identifier.scopusid2-s2.0-85117017975-
dc.type.rimsART-
dc.citation.volume119-
dc.citation.issue15-
dc.citation.publicationnameAPPLIED PHYSICS LETTERS-
dc.identifier.doi10.1063/5.0062751-
dc.contributor.localauthorSeo, Min-Kyo-
dc.contributor.localauthorKim, Kab-Jin-
dc.contributor.nonIdAuthorCao Van, Phuoc-
dc.contributor.nonIdAuthorJo, Younghun-
dc.contributor.nonIdAuthorJeong, Jong-Ryul-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusROOM-TEMPERATURE-
dc.subject.keywordPlusTRANSPORT-
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PH-Journal Papers(저널논문)
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