Record thermopower found in an IrMn-based spintronic stack

Tu，Sa1; Ziman，Timothy2,3,4; Yu，Guoqiang5,6; Wan，Caihua6; Hu，Junfeng1,7; Wu，Hao5; Wang，Hanchen1; Liu，Mengchao8; Liu，Chuanpu1; Guo，Chenyang6; Zhang，Jianyu1; Cabero Z，Marco A.1,9; Zhang，Youguang1; Gao，Peng8,10,11; Liu，Song9; Yu，Dapeng8,9; Han，Xiufeng6; Hallsteinsen，Ingrid12,13; Gilbert，Dustin A.14; Wölfle，Peter15; Wang，Kang L.5; Ansermet，Jean Philippe7; Maekawa，Sadamichi4,16; Yu，Haiming1

2020-12-01

10.1038/s41467-020-15797-6

Nature Communications   影响因子和分区

2041-1723

2041-1723

The Seebeck effect converts thermal gradients into electricity. As an approach to power technologies in the current Internet-of-Things era, on-chip energy harvesting is highly attractive, and to be effective, demands thin film materials with large Seebeck coefficients. In spintronics, the antiferromagnetic metal IrMn has been used as the pinning layer in magnetic tunnel junctions that form building blocks for magnetic random access memories and magnetic sensors. Spin pumping experiments revealed that IrMn Néel temperature is thickness-dependent and approaches room temperature when the layer is thin. Here, we report that the Seebeck coefficient is maximum at the Néel temperature of IrMn of 0.6 to 4.0 nm in thickness in IrMn-based half magnetic tunnel junctions. We obtain a record Seebeck coefficient 390 (±10) μV K at room temperature. Our results demonstrate that IrMn-based magnetic devices could harvest the heat dissipation for magnetic sensors, thus contributing to the Power-of-Things paradigm.

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英语

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其他

NSF China[11674020][U1801661] ; 111 talent program[B16001] ; National Key Research and Development Program of China[2016YFA0300802][2017YFA0206200] ; Key R&D Program of Guangdong Province[2018B030326001] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06D348] ; Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS20170303165926217] ; Sino-Swiss Science and Technology Cooperation (SSSTC)[EG 01-122016] ; ERATO-JST[JPMJER1402] ; KAKENHI from MEXT, Japan[26103005][JP16H04023][JP26247063] ; DOE Office of Science User Facility[DE-AC02-05CH11231]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000558822900009

NATURE PUBLISHING GROUP

2-s2.0-85083824086

Scopus

1.Fert Beijing Institute,BDBC,School of Microelectronics,Beihang University,Beijing,100191,China
2.Institut Laue-Langevin,Grenoble,38042,France
3.Université de Grenobles-Alpes,and CNRS,LPMMC,Grenoble,38042,France
4.Kavli Institute for Theoretical Sciences,University of Chinese Academy of Sciences,Beijing,100190,China
5.Department of Electrical Engineering,University of California,Los Angeles,90095,United States
6.Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing,100190,China
7.Institute of Physics,Ecole Polytechnique Fédérale de Lausanne (EPFL),Lausanne,1015,Switzerland
8.Electron Microscopy Laboratory,School of Physics,Peking University,Beijing,100871,China
9.Shenzhen Institute for Quantum Science and Engineering (SIQSE),and Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
10.International Center for Quantum Materials,School of Physics,Peking University,Beijing,100871,China
11.Collaborative Innovation Center of Quantum Matter,Beijing,100871,China
12.Department of Electronic Systems,Norwegian University of Science and Technology,Trondheim,7491,Norway
13.Advanced Light Source,Lawrence Berkeley National Laboratory,Berkeley,94720,United States
14.Material Science and Engineering Department,University of Tennessee,Knoxville,37996,United States
15.Institute for Theory of Condensed Matter,Karlsruhe Institute of Technology,Karlsruhe,76049,Germany
16.RIKEN Center for Emergent Matter Science (CEMS),Wako,351-0198,Japan

Tu，Sa,Ziman，Timothy,Yu，Guoqiang,et al. Record thermopower found in an IrMn-based spintronic stack[J]. Nature Communications,2020,11(1).

Tu，Sa.,Ziman，Timothy.,Yu，Guoqiang.,Wan，Caihua.,Hu，Junfeng.,...&Yu，Haiming.(2020).Record thermopower found in an IrMn-based spintronic stack.Nature Communications,11(1).

Tu，Sa,et al."Record thermopower found in an IrMn-based spintronic stack".Nature Communications 11.1(2020).