Effects of a NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons

Yi Cao; Li Jin Wang; Chun Feng; Jing Yan Zhang; Feng Yang; Shao Wei Li; Shao Long Jiang; Yang Liu; Guang Yang; Chong Jun Zhao; Fu Song; Zhong Fu Zhou; Guang Hua Yu

doi:10.1016/j.matlet.2014.09.011

Effects of a NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons

Yi Cao
, Li Jin Wang
, Chun Feng^*
, Jing Yan Zhang
, Feng Yang
, Shao Wei Li
, Shao Long Jiang
, Yang Liu
, Guang Yang
, Chong Jun Zhao
, Fu Song
, Zhong Fu Zhou
, Guang Hua Yu

^*Corresponding author for this work

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

6 Scopus citations

Abstract

The effects of an NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons were studied by measuring the Seebeck coefficient (S) and anisotropic magneto-thermopower (AMT) of an MgO/NiFe/MgO multilayer structure. Thermally annealing this multilayer was found to increase S (343% at 450 °C) through crystallization of interfacial MgO, which allows conductive electrons to achieve better specular scattering at the interface. The AMT was also increased by annealing (139% at 450 °C), but this is ascribed to a chemical metallization of interfacial Fe in which the deposition-induced oxygen atoms migrate out of the NiFe layer. This helps to recover the magnetization of NiFe, thereby causing spin-dependent thermoelectric transport behavior at the interface.

Original language	English
Pages (from-to)	351-353
Number of pages	3
Journal	Materials Letters
Volume	137
DOIs	https://doi.org/10.1016/j.matlet.2014.09.011
State	Published - 15 Dec 2014
Externally published	Yes

Keywords

Anisotropic magneto-thermopower
Interfaces
Interfacial oxygen migration
Magnetic materials
Multilayer structure

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10.1016/j.matlet.2014.09.011

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@article{4891a80d466c4cc1b3fdc8f75230a52d,

title = "Effects of a NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons",

abstract = "The effects of an NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons were studied by measuring the Seebeck coefficient (S) and anisotropic magneto-thermopower (AMT) of an MgO/NiFe/MgO multilayer structure. Thermally annealing this multilayer was found to increase S (343\% at 450 °C) through crystallization of interfacial MgO, which allows conductive electrons to achieve better specular scattering at the interface. The AMT was also increased by annealing (139\% at 450 °C), but this is ascribed to a chemical metallization of interfacial Fe in which the deposition-induced oxygen atoms migrate out of the NiFe layer. This helps to recover the magnetization of NiFe, thereby causing spin-dependent thermoelectric transport behavior at the interface.",

keywords = "Anisotropic magneto-thermopower, Interfaces, Interfacial oxygen migration, Magnetic materials, Multilayer structure",

author = "Yi Cao and Wang, \{Li Jin\} and Chun Feng and Zhang, \{Jing Yan\} and Feng Yang and Li, \{Shao Wei\} and Jiang, \{Shao Long\} and Yang Liu and Guang Yang and Zhao, \{Chong Jun\} and Fu Song and Zhou, \{Zhong Fu\} and Yu, \{Guang Hua\}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2014.09.011",

language = "英语",

volume = "137",

pages = "351--353",

journal = "Materials Letters",

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publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effects of a NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons

AU - Cao, Yi

AU - Wang, Li Jin

AU - Feng, Chun

AU - Zhang, Jing Yan

AU - Yang, Feng

AU - Li, Shao Wei

AU - Jiang, Shao Long

AU - Liu, Yang

AU - Yang, Guang

AU - Zhao, Chong Jun

AU - Song, Fu

AU - Zhou, Zhong Fu

AU - Yu, Guang Hua

PY - 2014/12/15

Y1 - 2014/12/15

N2 - The effects of an NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons were studied by measuring the Seebeck coefficient (S) and anisotropic magneto-thermopower (AMT) of an MgO/NiFe/MgO multilayer structure. Thermally annealing this multilayer was found to increase S (343% at 450 °C) through crystallization of interfacial MgO, which allows conductive electrons to achieve better specular scattering at the interface. The AMT was also increased by annealing (139% at 450 °C), but this is ascribed to a chemical metallization of interfacial Fe in which the deposition-induced oxygen atoms migrate out of the NiFe layer. This helps to recover the magnetization of NiFe, thereby causing spin-dependent thermoelectric transport behavior at the interface.

AB - The effects of an NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons were studied by measuring the Seebeck coefficient (S) and anisotropic magneto-thermopower (AMT) of an MgO/NiFe/MgO multilayer structure. Thermally annealing this multilayer was found to increase S (343% at 450 °C) through crystallization of interfacial MgO, which allows conductive electrons to achieve better specular scattering at the interface. The AMT was also increased by annealing (139% at 450 °C), but this is ascribed to a chemical metallization of interfacial Fe in which the deposition-induced oxygen atoms migrate out of the NiFe layer. This helps to recover the magnetization of NiFe, thereby causing spin-dependent thermoelectric transport behavior at the interface.

KW - Anisotropic magneto-thermopower

KW - Interfaces

KW - Interfacial oxygen migration

KW - Magnetic materials

KW - Multilayer structure

UR - https://www.scopus.com/pages/publications/84907532474

U2 - 10.1016/j.matlet.2014.09.011

DO - 10.1016/j.matlet.2014.09.011

M3 - 文章

AN - SCOPUS:84907532474

SN - 0167-577X

VL - 137

SP - 351

EP - 353

JO - Materials Letters

JF - Materials Letters

ER -

Effects of a NiFe/MgO interface on the thermoelectric transport behavior of spin-polarized electrons

Abstract

Keywords

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