title: Thermoelectric Signal Enhancement by Reconciling the Spin Seebeck and Anomalous Nernst Effects in Ferromagnet/Non-magnet Multilayers.
abstract: The utilization of ferromagnetic (FM) materials in thermoelectric devices allows one to have a simpler structure and/or independent control of electric and thermal conductivities, which may further remove obstacles for this technology to be realized. The thermoelectricity in FM/non-magnet (NM) heterostructures using an optical heating source is studied as a function of NM materials and a number of multilayers. It is observed that the overall thermoelectric signal in those structures which is contributed by spin Seebeck effect and anomalous Nernst effect (ANE) is enhanced by a proper selection of NM materials with a spin Hall angle that matches to the sign of the ANE. Moreover, by an increase of the number of multilayer, the thermoelectric voltage is enlarged further and the device resistance is reduced, simultaneously. The experimental observation of the improvement of thermoelectric properties may pave the way for the realization of magnetic-(or spin-) based thermoelectric devices.
authors.affiliation: Department of Materials Science and Engineering, KI for the Nanocentury, KAIST, Daejeon, 305-701, Korea.
authors.forename: Kyeong-Dong
authors.initials: KD
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, KI for the Nanocentury, KAIST, Daejeon, 305-701, Korea.
authors.forename: Dong-Jun
authors.initials: DJ
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, KI for the Nanocentury, KAIST, Daejeon, 305-701, Korea.
authors.forename: Hae
authors.initials: H
authors.lastname: Yeon Lee
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Green Energy Technology, Chungnam National University, Daejeon, 305-764, Korea.
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Green Energy Technology, Chungnam National University, Daejeon, 305-764, Korea.
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Green Energy Technology, Chungnam National University, Daejeon, 305-764, Korea.
authors.forename: Kyung-Min
authors.initials: KM
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Green Energy Technology, Chungnam National University, Daejeon, 305-764, Korea.
authors.forename: Jong-Ryul
authors.initials: JR
authors.lastname: Jeong
authors.affiliation: School of Mechanical and Advanced Materials Engineering, UNIST, Ulsan, 689-798, Korea.
authors.forename: Ki-Suk
authors.initials: KS
authors.lastname: Lee
authors.affiliation: 1] Department of Physics and CNSM, KAIST, Daejeon, 305-701, Korea [2] Department of Emerging Materials Science, DGIST, Daegu, 711-873, Korea.
authors.forename: Hyon-Seok
authors.initials: HS
authors.lastname: Song
authors.affiliation: 1] Department of Physics and CNSM, KAIST, Daejeon, 305-701, Korea [2] Department of Emerging Materials Science, DGIST, Daegu, 711-873, Korea.
authors.forename: Jeong-Woo
authors.initials: JW
authors.lastname: Sohn
authors.affiliation: 1] Department of Physics and CNSM, KAIST, Daejeon, 305-701, Korea [2] Department of Emerging Materials Science, DGIST, Daegu, 711-873, Korea.
authors.forename: Sung-Chul
authors.initials: SC
authors.lastname: Shin
authors.affiliation: Department of Materials Science and Engineering, KI for the Nanocentury, KAIST, Daejeon, 305-701, Korea.
authors.forename: Byong-Guk
authors.initials: BG
authors.lastname: Park