Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires

Nagarjuna Asam; Kazuto Yamanoi; Kohei Ohnishi; Takashi Kimura

doi:10.1007/s10948-019-5016-5

Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires

Nagarjuna Asam, Kazuto Yamanoi, Kohei Ohnishi, Takashi Kimura

Research output: Contribution to journal › Article › peer-review

Abstract

We have investigated the influence of the spin-dependent scattering on the heat transports in NiFe/Cu/NiFe and Co/Cu/Co tri-layered nanowires. The thermal conductivity and its spin dependence for the tri-layered wires have been evaluated by using an integrated nano-sized thermo couple. We find that the thermal spin-valve effect is always approximately 8 times larger than the electrical spin-valve effect, namely giant magnetoresistance effect. The numerical simulation with the experimental results enable us to estimate the thermal conductivity for the tri-layered wire and its spin dependence. Surprisingly, the spin dependence of the thermal conductivity for the Co/Cu/Co wire is as high as 8%, which is much larger than the electrical one. This indicates a high potential application of the thermal spin-valve effect.

Original language	English
Pages (from-to)	3109-3113
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	32
Issue number	10
DOIs	https://doi.org/10.1007/s10948-019-5016-5
Publication status	Published - 2019 Oct 1
Externally published	Yes

Keywords

Heat transport
Seebeck effect
Spin-dependent transport

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-019-5016-5

Cite this

@article{1be53afa88284ee4b6f850e7abfcab1c,

title = "Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires",

abstract = "We have investigated the influence of the spin-dependent scattering on the heat transports in NiFe/Cu/NiFe and Co/Cu/Co tri-layered nanowires. The thermal conductivity and its spin dependence for the tri-layered wires have been evaluated by using an integrated nano-sized thermo couple. We find that the thermal spin-valve effect is always approximately 8 times larger than the electrical spin-valve effect, namely giant magnetoresistance effect. The numerical simulation with the experimental results enable us to estimate the thermal conductivity for the tri-layered wire and its spin dependence. Surprisingly, the spin dependence of the thermal conductivity for the Co/Cu/Co wire is as high as 8%, which is much larger than the electrical one. This indicates a high potential application of the thermal spin-valve effect.",

keywords = "Heat transport, Seebeck effect, Spin-dependent transport",

author = "Nagarjuna Asam and Kazuto Yamanoi and Kohei Ohnishi and Takashi Kimura",

note = "Publisher Copyright: {\textcopyright} 2019, Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2019",

month = oct,

day = "1",

doi = "10.1007/s10948-019-5016-5",

language = "English",

volume = "32",

pages = "3109--3113",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "10",

}

TY - JOUR

T1 - Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires

AU - Asam, Nagarjuna

AU - Yamanoi, Kazuto

AU - Ohnishi, Kohei

AU - Kimura, Takashi

PY - 2019/10/1

Y1 - 2019/10/1

N2 - We have investigated the influence of the spin-dependent scattering on the heat transports in NiFe/Cu/NiFe and Co/Cu/Co tri-layered nanowires. The thermal conductivity and its spin dependence for the tri-layered wires have been evaluated by using an integrated nano-sized thermo couple. We find that the thermal spin-valve effect is always approximately 8 times larger than the electrical spin-valve effect, namely giant magnetoresistance effect. The numerical simulation with the experimental results enable us to estimate the thermal conductivity for the tri-layered wire and its spin dependence. Surprisingly, the spin dependence of the thermal conductivity for the Co/Cu/Co wire is as high as 8%, which is much larger than the electrical one. This indicates a high potential application of the thermal spin-valve effect.

AB - We have investigated the influence of the spin-dependent scattering on the heat transports in NiFe/Cu/NiFe and Co/Cu/Co tri-layered nanowires. The thermal conductivity and its spin dependence for the tri-layered wires have been evaluated by using an integrated nano-sized thermo couple. We find that the thermal spin-valve effect is always approximately 8 times larger than the electrical spin-valve effect, namely giant magnetoresistance effect. The numerical simulation with the experimental results enable us to estimate the thermal conductivity for the tri-layered wire and its spin dependence. Surprisingly, the spin dependence of the thermal conductivity for the Co/Cu/Co wire is as high as 8%, which is much larger than the electrical one. This indicates a high potential application of the thermal spin-valve effect.

KW - Heat transport

KW - Seebeck effect

KW - Spin-dependent transport

UR - http://www.scopus.com/inward/record.url?scp=85063193308&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063193308&partnerID=8YFLogxK

U2 - 10.1007/s10948-019-5016-5

DO - 10.1007/s10948-019-5016-5

M3 - Article

AN - SCOPUS:85063193308

SN - 1557-1939

VL - 32

SP - 3109

EP - 3113

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 10

ER -

Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this