Suppression of interlayer coupling and enhancement of magnetoresistant in spin valves with oxide layer

Kebin Li; Yihong Wu; Jinjun Qiu; Guchang Han; Zaibing Guo; Hong Xie; Towchong Chong

doi:10.1063/1.1421228

Suppression of interlayer coupling and enhancement of magnetoresistant in spin valves with oxide layer

Kebin Li^*, Yihong Wu, Jinjun Qiu, Guchang Han, Zaibing Guo, Hong Xie, Towchong Chong

^*Corresponding author for this work

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

33 Scopus citations

Abstract

The interlayer coupling field (H_int) between the free and pinned ferromagnetic (FM) layers in an exchange-biased spin valve deposited by magnetron sputtering is usually dominated by the Néel "orange peel" coupling. The orange peel coupling is suppressed dramatically when an oxide layer (OXL) is inserted into the free/pinned FM layers due to smoother surface roughness at the interface. H_int decreases with increasing oxygen exposure dose of the free/pinned FM layers to pure O₂ gas. And it is found that Ruderman-Kittel-Kasuya-Yoshida exchange coupling dominates in OXL spin valves due to smoother surface roughness and enhanced specular electron scattering at the interface between OXL and pinned/free FM layers, which also results in enhancement of magnetoresistance effect.

Original language	English (US)
Pages (from-to)	3663-3665
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	22
DOIs	https://doi.org/10.1063/1.1421228
State	Published - Nov 26 2001
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Suppression of interlayer coupling and enhancement of magnetoresistant in spin valves with oxide layer",

abstract = "The interlayer coupling field (Hint) between the free and pinned ferromagnetic (FM) layers in an exchange-biased spin valve deposited by magnetron sputtering is usually dominated by the N{\'e}el {"}orange peel{"} coupling. The orange peel coupling is suppressed dramatically when an oxide layer (OXL) is inserted into the free/pinned FM layers due to smoother surface roughness at the interface. Hint decreases with increasing oxygen exposure dose of the free/pinned FM layers to pure O2 gas. And it is found that Ruderman-Kittel-Kasuya-Yoshida exchange coupling dominates in OXL spin valves due to smoother surface roughness and enhanced specular electron scattering at the interface between OXL and pinned/free FM layers, which also results in enhancement of magnetoresistance effect.",

author = "Kebin Li and Yihong Wu and Jinjun Qiu and Guchang Han and Zaibing Guo and Hong Xie and Towchong Chong",

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language = "English (US)",

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T1 - Suppression of interlayer coupling and enhancement of magnetoresistant in spin valves with oxide layer

AU - Li, Kebin

AU - Wu, Yihong

AU - Qiu, Jinjun

AU - Han, Guchang

AU - Guo, Zaibing

AU - Xie, Hong

AU - Chong, Towchong

PY - 2001/11/26

Y1 - 2001/11/26

N2 - The interlayer coupling field (Hint) between the free and pinned ferromagnetic (FM) layers in an exchange-biased spin valve deposited by magnetron sputtering is usually dominated by the Néel "orange peel" coupling. The orange peel coupling is suppressed dramatically when an oxide layer (OXL) is inserted into the free/pinned FM layers due to smoother surface roughness at the interface. Hint decreases with increasing oxygen exposure dose of the free/pinned FM layers to pure O2 gas. And it is found that Ruderman-Kittel-Kasuya-Yoshida exchange coupling dominates in OXL spin valves due to smoother surface roughness and enhanced specular electron scattering at the interface between OXL and pinned/free FM layers, which also results in enhancement of magnetoresistance effect.

AB - The interlayer coupling field (Hint) between the free and pinned ferromagnetic (FM) layers in an exchange-biased spin valve deposited by magnetron sputtering is usually dominated by the Néel "orange peel" coupling. The orange peel coupling is suppressed dramatically when an oxide layer (OXL) is inserted into the free/pinned FM layers due to smoother surface roughness at the interface. Hint decreases with increasing oxygen exposure dose of the free/pinned FM layers to pure O2 gas. And it is found that Ruderman-Kittel-Kasuya-Yoshida exchange coupling dominates in OXL spin valves due to smoother surface roughness and enhanced specular electron scattering at the interface between OXL and pinned/free FM layers, which also results in enhancement of magnetoresistance effect.

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U2 - 10.1063/1.1421228

DO - 10.1063/1.1421228

M3 - Article

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EP - 3665

JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Suppression of interlayer coupling and enhancement of magnetoresistant in spin valves with oxide layer

Abstract

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