Composition dependence of spin Seebeck voltage in YIG/Pt100−X Ru X , Pt100−X Cu X , and Pt100−X (Cu0.5Ru0.5) X

Li, Houlin; Kurokawa, Yuichiro; Niimura, Takumi; Yamauchi, Tomoki; Yuasa, Hiromi

doi:10.35848/1347-4065/ab9653

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…In recent years, spin‐momentum‐mediated heat–charge conversion technologies aimed at the development of thin thermoelectric generators and heat flow sensors have been extensively studied. [ 1–29 ] The thermoelectric generation (TEG) based on the spin Seebeck (SSE) effect is a promising technology. [ 1–5,7–13,15–20,22,23,25–29 ] The SSE converts the temperature difference into spin current in a magnetic material.…”

Section: Introductionmentioning

confidence: 99%

“…[ 1–29 ] The thermoelectric generation (TEG) based on the spin Seebeck (SSE) effect is a promising technology. [ 1–5,7–13,15–20,22,23,25–29 ] The SSE converts the temperature difference into spin current in a magnetic material. When a heavy metal (HM) with a large spin–orbit coupling is attached to a magnetic material, the spin current generates an electric current according to the inverse spin Hall effect (ISHE).…”

Section: Introductionmentioning

confidence: 99%

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Inkjet‐Printed Flexible Spin Seebeck Thermopile Device for Low‐Cost Spintronics Device Fabrication

Kurokawa,

Yamada,

Yuasa

2023

Adv Eng Mater

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Spin‐momentum‐mediated heat–charge conversion technologies for developing thin thermoelectric generators and heat flow sensors have been extensively studied. The thermoelectric generation (TEG) based on the spin Seebeck (SSE) effect is a promising technology. In this study, a flexible SSE thermopile device is fabricated using inkjet printing with Fe3O4 and Ag nanoparticle (NP) ink. A square Fe3O4 NP and a wire‐shaped Ag NP layer are used as the first and second layers, respectively. These layers are overlaid using inkjet printing twice. To obtain the SSE voltage (VSSE), a thin Pt film is deposited on a printed thermopile device. SSE generators consisting of a Pt thin film/Fe3O4 NP layer are connected through a Ag NP wire to form a thermopile structure. The saturated VSSE of the SSE thermopile device increases with the number of SSE generators. In addition, the SSE‐TEG of an SSE thermopile device is observed using a heat source with a curved surface. In these results, it is indicated that the inkjet‐printing fabrication method holds great potential in both the SSE thermopile devices and the flexible spintronic devices because it is a simple and fast process that does not require lithography.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inkjet‐Printed Flexible Spin Seebeck Thermopile Device for Low‐Cost Spintronics Device Fabrication

Kurokawa,

Yamada,

Yuasa

2023

Adv Eng Mater

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Scalable spin Seebeck thermoelectric generation using Fe-oxide nanoparticle assembled film on flexible substrate

Kurokawa

Tahara

Hamada

et al. 2022

Sci Rep

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We fabricated Fe3O4 nanoparticle (NP)-assembled films on flexible polyimide sheets with Pt or Ta cap layer using a spin coating method and DC sputtering. The films were elaborated for spin Seebeck thermoelectric generator applications, and their spin Seebeck voltages were observed. We showed that the thermoelectric power of [Pt film/Fe3O4 NP]n multilayered films increases with increasing number of stacking n. Additionally, we prepared spin Seebeck thermopile devices in which the Fe3O4 NP-assembled films capped by Pt and Ta are connected alternately in series. We demonstrated that spin Seebeck voltages of the thermopile devices are larger than those of single [Pt or Ta film/Fe3O4 NP]n piece. Our results indicate that the spin Seebeck thermoelectric power of Fe3O4 NPs can be enhanced using a simple fabrication process without lithography technique.

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Highly efficient spin-current generation from Pt/Ru multilayers

Bai

Zhai

Yun

et al. 2021

Applied Physics Letters

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Increasing spin Hall angle of heavy metals has attracted considerable attention due to their potential applications in spintronic technology. Here, we demonstrate that the spin Hall angle could be enhanced dramatically in the Ta/[Pt/Ru]n/Pt/Co/Ta multilayers. The spin Hall angle reaches a maximum value of 0.28 when n = 5 from the loop-shift method with a relative low resistivity of approximately 48 μΩ cm. Meanwhile a minimum critical switching current density approximately 3.2 × 106 A/cm2 under an in-plane bias magnetic field around 5% of the perpendicular anisotropy field was obtained for the sample with n = 5 in current-induced magnetization switching experiment. We find that the extrinsic spin Hall mechanism changes from the spin skew scattering when n < 2 to spin side-jump mechanism when n > 2. This work provides an effective way in increasing spin Hall angle for low-power consumption spintronics devices.

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Composition dependence of spin Seebeck voltage in YIG/Pt_100−XRu_X, Pt_100−XCu_X, and Pt_100−X(Cu_0.5Ru_0.5)_X

Cited by 4 publications

References 40 publications

Inkjet‐Printed Flexible Spin Seebeck Thermopile Device for Low‐Cost Spintronics Device Fabrication

Inkjet‐Printed Flexible Spin Seebeck Thermopile Device for Low‐Cost Spintronics Device Fabrication

Scalable spin Seebeck thermoelectric generation using Fe-oxide nanoparticle assembled film on flexible substrate

Highly efficient spin-current generation from Pt/Ru multilayers

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