000063023 001__ 63023 000063023 005__ 20191113135212.0 000063023 0247_ $$2doi$$a10.1103/PhysRevB.96.064428 000063023 0248_ $$2sideral$$a101670 000063023 037__ $$aART-2017-101670 000063023 041__ $$aeng 000063023 100__ $$aHirschner, J. 000063023 245__ $$aSpin Seebeck effect in Y-type hexagonal ferrite thin films 000063023 260__ $$c2017 000063023 5060_ $$aAccess copy available to the general public$$fUnrestricted 000063023 5203_ $$aThe longitudinal spin Seebeck effect (SSE) has been investigated using Pt/ferrite bilayers employing two Y-hexagonal ferrites Ba2Zn2Fe12O22 (Zn2Y) and Ba2Co2Fe12O22 (Co2Y) deposited by a spin-coating method on SrTiO3(111) substrates. The prepared hexagonal ferrites are highly oriented with c axes perpendicular to the substrate plane. The room-temperature magnetic moments of both ferrimagnetic ferrites amount to similar values and, most importantly, both have easy magnetization normal to the c axis. Despite their similar magnetic response the notable SSE signal is only observed for Zn2Y whereas the SSE signal of Co2Y is below the experimental noise level. A plausible explanation for this surprising discrepancy is magnetic disorder induced by cobalt cations, the random distribution of which in the Co2Y ferrite structure might critically limit the spin-wave propagation. This results in suppression of the SSE signal in Co2Y, while the Zn2Y with nonmagnetic substituent exhibits significant SSE signal. The temperature dependence of SSE for Zn2Y was measured over the 30-300-K range and quantitatively analyzed considering the heat flow through the Pt/Zn2Y bilayer and thermal gradient across the Zn2Y thin layer as the most relevant parameters. Using this approach the normalized SSE smoothly increases with lowering temperature, which correlates to increasing magnon propagation length and magnetization with decreasing temperature. 000063023 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C-R$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 734187-SPICOLOST$$9info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST$$9info:eu-repo/grantAgreement/EC/FP7/304043/EU/High Performance Energy Conversion by the interplay between Thermoelectricity and Spin Seebeck Effect/THERMO-SPINTRONIC 000063023 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/ 000063023 590__ $$a3.813$$b2017 000063023 591__ $$aPHYSICS, CONDENSED MATTER$$b18 / 67 = 0.269$$c2017$$dQ2$$eT1 000063023 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000063023 700__ $$aMaryško, M. 000063023 700__ $$aHejtmánek, J. 000063023 700__ $$aUhrecký, R. 000063023 700__ $$aSoroka, M. 000063023 700__ $$aBuršík, J. 000063023 700__ $$0(orcid)0000-0001-5939-6415$$aAnadón, A.$$uUniversidad de Zaragoza 000063023 700__ $$0(orcid)0000-0002-1296-4793$$aAguirre, M.H.$$uUniversidad de Zaragoza 000063023 700__ $$aKníŽek, K. 000063023 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada 000063023 773__ $$g96, 6 (2017), [8 pp]$$pPhys. Rev. B$$tPhysical Review B$$x2469-9950 000063023 8564_ $$s1383339$$uhttps://zaguan.unizar.es/record/63023/files/texto_completo.pdf$$yVersión publicada 000063023 8564_ $$s133311$$uhttps://zaguan.unizar.es/record/63023/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000063023 909CO $$ooai:zaguan.unizar.es:63023$$particulos$$pdriver 000063023 951__ $$a2019-11-13-13:45:03 000063023 980__ $$aARTICLE