Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films

被引：6

作者：

Portavoce, Alain ^{[1
]}

Assaf, Elie ^{[1
]}

Bertoglio, Maxime ^{[1
]}

Narducci, Dario ^{[2
]}

Bertaina, Sylvain ^{[1
]}

机构：

[1] Aix Marseille Univ, Fac Sci St Jerome Case 142, CNRS, IM2NP, F-13397 Marseille, France

[2] Univ Milano Bicocca, Dept Mat Sci, Via R Cozzi 55, I-20125 Milan, Italy

来源：

SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期

关键词：

THERMOELECTRIC PROPERTIES; POWER-GENERATION; TEMPERATURE; ENHANCEMENT; TRANSITION; CRYSTAL; DENSITY;

D O I：

10.1038/s41598-022-26993-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnetic materials may be engineered to produce thermoelectric materials using spin-related effects. However, clear understanding of localized magnetic moments (mu(I)), free carriers, and Seebeck coefficient (S) interrelations is mandatory for efficient material design. In this work, we investigate mu(I) influence on the spin-dependent S of model ferromagnetic thin films, allowing mu(I) thermal fluctuations, ordering, and density variation influence to be independently investigated. mu(I) influence on free carrier polarization is found to be of highest importance on S: efficient coupling of free carrier spin and localized magnetic moment promotes the increase of S, while spin-dependent relaxation time difference between the two spin-dependent conduction channels leads to S decrease. Our observations support new routes for thermoelectric material design based on spin-related effects in ferromagnetic materials.

引用

页数：9

共 51 条

[1] New experimental methodology, setup and LabView program for accurate absolute thermoelectric power and electrical resistivity measurements between 25 and 1600 K: Application to pure copper, platinum, tungsten, and nickel at very high temperatures [J].

Abadlia, L. ;

Gasser, F. ;

Khalouk, K. ;

Mayoufi, M. ;

Gasser, J. G. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2014, 85 (09)

[2] Theory of the spin Seebeck effect [J].

Adachi, Hiroto ;

Uchida, Ken-ichi ;

Saitoh, Eiji ;

Maekawa, Sadamichi .

REPORTS ON PROGRESS IN PHYSICS, 2013, 76 (03)

[3] Carbon concentration, Curie temperature, and magnetic resonance field of Mn5Ge3(C) thin films [J].

Assaf, E. ;

Portavoce, A. ;

Descoins, M. ;

Bertoglio, M. ;

Bertaina, S. .

MATERIALIA, 2019, 8

[4] Structural and magnetic properties of MnCoGe ferromagnetic thin films produced by reactive diffusion [J].

Assaf, E. ;

Portavoce, A. ;

Patout, L. ;

Bertoglio, M. ;

Clerac, R. ;

Hoummada, K. ;

Charai, A. ;

Bertaina, S. .

APPLIED SURFACE SCIENCE, 2019, 488 :303-315

[5] High Curie temperature Mn5Ge3 thin films produced by non-diffusive reaction [J].

Assaf, E. ;

Portavoce, A. ;

Hoummada, K. ;

Bertoglio, M. ;

Bertaina, S. .

APPLIED PHYSICS LETTERS, 2017, 110 (07)

[6]

Chambers R. G, 1990, ELECT MET SEMICOND, P186

[7] Electrical power generation from moderate-temperature radiative thermal sources [J].

Davids, Paul S. ;

Kirsch, Jared ;

Starbuck, Andrew ;

Jarecki, Robert ;

Shank, Joshua ;

Peters, David .

SCIENCE, 2020, 367 (6484) :1341-+

[8]

Deng S., 2021, PHYS REV B, V103, P1

[9] Si0.97Ge0.03 microelectronic thermoelectric generators with high power and voltage densities [J].

Dhawan, Ruchika ;

Madusanka, Prabuddha ;

Hu, Gangyi ;

Debord, Jeff ;

Tran, Toan ;

Maggio, Kenneth ;

Edwards, Hal ;

Lee, Mark .

NATURE COMMUNICATIONS, 2020, 11 (01)

[10] THE SPATIAL-DISTRIBUTION OF MAGNETIZATION DENSITY IN MN5GE3 [J].

FORSYTH, JB ;

BROWN, PJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (11) :2713-2720

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