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 journalArticlepeer-review

33 Scopus citations

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 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.

Original languageEnglish (US)
Pages (from-to)3663-3665
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number22
DOIs
StatePublished - Nov 26 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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