Thermoelectric Signal Enhancement by Reconciling the Spin Seebeck and Anomalous Nernst Effects in Ferromagnet/Non-magnet Multilayers

被引：0
作者：
Kyeong-Dong Lee
Dong-Jun Kim
Hae Yeon Lee
Seung-Hyun Kim
Jong-Hyun Lee
Kyung-Min Lee
Jong-Ryul Jeong
Ki-Suk Lee
Hyon-Seok Song
Jeong-Woo Sohn
Sung-Chul Shin
Byong-Guk Park
机构：
[1] KI for the Nanocentury,Department of Materials Science and Engineering
[2] KAIST,Department of Materials Science and Engineering
[3] Graduate School of Green Energy Technology,Department of Physics and CNSM
[4] Chungnam National University,Department of Emerging Materials Science
[5] School of Mechanical and Advanced Materials Engineering,undefined
[6] UNIST,undefined
[7] KAIST,undefined
[8] DGIST,undefined
来源：
Scientific Reports | / 5卷
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摘要：
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.
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