Multi-resistance state tuned by interfacial active Pt layer in a perpendicular Hall balance

Jingyan Zhang, Pengwei Dou, Wenlin Peng, Yuan Zhuang, Jialong Liu, Amit Kohn, Eran Amsellem, Caiyin You, Jiaqiang Liu, Xinqi Zheng, Guanghua Yu, Yong Jiang, Shouguo Wang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The effect of interfacial Pt layer on multi-resistance states in perpendicular Hall balance with core structure of [Co/Pt]n/NiO/[Co/Pt]n multilayers was systematically investigated. By inserting an ultrathin Pt layer between [Co/Pt]n and NiO spacer, resistance states and the Hall resistance ratio (HRR) were successfully tuned. Our results indicate that the inserted ultrathin Pt layer plays a crucial role on spin dependent transport properties, achieving a HRR of up to 30,900%. Furthermore, the resistance in Hall balance can be smoothly altered among 2-, 3-, and 4-states by optimizing the ultrathin active Pt layer. Pt catalyst with high electronic activity, as measured by X-ray photoelectron spectroscopy (XPS), provides a novel approach for modifying the interfacial orbital hybridization, thus leading to a tunable resistance states and HRR value.

Original languageEnglish
Article number146475
JournalApplied Surface Science
Volume521
DOIs
StatePublished - 15 Aug 2020
Externally publishedYes

Keywords

  • Hall balance
  • Hall resistance ratio
  • Interfacial hybridization
  • Perpendicular magnetic anisotropy

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Physics and Astronomy (all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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