Continuous control of spin polarization using a magnetic field

J. A. Gifford; G. J. Zhao; B. C. Li; Brian D. Tracy; J. Zhang; D. R. Kim; David Smith; Tingyong Chen

doi:10.1063/1.4952437

Continuous control of spin polarization using a magnetic field

J. A. Gifford, G. J. Zhao, B. C. Li, Brian D. Tracy, J. Zhang, D. R. Kim, David Smith, Tingyong Chen

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

1 Scopus citations

Abstract

The giant magnetoresistance (GMR) of a point contact between a Co/Cu multilayer and a superconductor tip varies for different bias voltage. Direct measurement of spin polarization by Andreev reflection spectroscopy reveals that the GMR change is due to a change in spin polarization. This work demonstrates that the GMR structure can be utilized as a spin source and that the spin polarization can be continuously controlled by using an external magnetic field.

Original language	English (US)
Article number	212401
Journal	Applied Physics Letters
Volume	108
Issue number	21
DOIs	https://doi.org/10.1063/1.4952437
State	Published - May 23 2016

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4952437

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abstract = "The giant magnetoresistance (GMR) of a point contact between a Co/Cu multilayer and a superconductor tip varies for different bias voltage. Direct measurement of spin polarization by Andreev reflection spectroscopy reveals that the GMR change is due to a change in spin polarization. This work demonstrates that the GMR structure can be utilized as a spin source and that the spin polarization can be continuously controlled by using an external magnetic field.",

author = "Gifford, {J. A.} and Zhao, {G. J.} and Li, {B. C.} and Tracy, {Brian D.} and J. Zhang and Kim, {D. R.} and David Smith and Tingyong Chen",

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AU - Gifford, J. A.

AU - Zhao, G. J.

AU - Li, B. C.

AU - Tracy, Brian D.

AU - Zhang, J.

AU - Kim, D. R.

AU - Smith, David

AU - Chen, Tingyong

PY - 2016/5/23

Y1 - 2016/5/23

N2 - The giant magnetoresistance (GMR) of a point contact between a Co/Cu multilayer and a superconductor tip varies for different bias voltage. Direct measurement of spin polarization by Andreev reflection spectroscopy reveals that the GMR change is due to a change in spin polarization. This work demonstrates that the GMR structure can be utilized as a spin source and that the spin polarization can be continuously controlled by using an external magnetic field.

AB - The giant magnetoresistance (GMR) of a point contact between a Co/Cu multilayer and a superconductor tip varies for different bias voltage. Direct measurement of spin polarization by Andreev reflection spectroscopy reveals that the GMR change is due to a change in spin polarization. This work demonstrates that the GMR structure can be utilized as a spin source and that the spin polarization can be continuously controlled by using an external magnetic field.

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Continuous control of spin polarization using a magnetic field

Abstract

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