Effect of MgO/Co interface and Co/MgO interface on the spin dependent transport in perpendicular Co/Pt multilayers

Effect of the metal/oxide interface on spin-dependent transport properties in perpendicular [Co/Pt]3 multilayers was investigated. The saturation Hall resistivity (ρxy) is significantly increased by 45% with 1.4 nm thick CoO layer inserted at the top Co/MgO interface; whereas it is increased only 25...

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Bibliographic Details
Published in:Journal of applied physics 2014-10, Vol.116 (16)
Main Authors: Zhang, J. Y., Yang, G., Wang, S. G., Liu, Y. W., Zhao, Z. D., Wu, Z. L., Zhang, S. L., Chen, X., Feng, C., Yu, G. H.
Format: Article
Language:English
Subjects:
Applied physics
CHEMICAL STATE
COBALT
COBALT OXIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
INTERFACES
LAYERS
Magnesium oxide
MAGNESIUM OXIDES
METALS
Multilayers
Organic chemistry
SATURATION
SPIN
Transport properties
X ray spectra
X-RAY PHOTOELECTRON SPECTROSCOPY
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Summary:Effect of the metal/oxide interface on spin-dependent transport properties in perpendicular [Co/Pt]3 multilayers was investigated. The saturation Hall resistivity (ρxy) is significantly increased by 45% with 1.4 nm thick CoO layer inserted at the top Co/MgO interface; whereas it is increased only 25% with 1 nm thick CoO layer at the bottom MgO/Co interface. The interfacial structures characterized by X-ray photoelectron spectroscopy show that the MgO/Co interface and Co/MgO interface including chemical states play a dominant role on spin-dependent transport, leading to different anomalous Hall behavior.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4900193