Weak Antilocalization and Spin Hall Effect in Pt Films Doped with Molecular Spin

Wataru Iwamoto, Takashi Yamamoto, Kaname Tsuchii, Yuya Tazaki, Akio Asami, Hiroki Hayashi, Yasuaki Einaga, Kazuya Ando

Research output: Contribution to journalArticlepeer-review

Abstract

A high degree of tunability and versatility of organic chemistry has paved the way toward molecular engineering of electronic and spintronic devices. Here, we report molecular spin doping of a Pt film, the key material in spin orbitronics. The molecular spin doping using a monolayer of a metal terpyridine complex allows to control the interaction between the conduction electrons and localized magnetic moments in the Pt film. The interaction was probed by measuring the weak antilocalization, which demonstrates enhanced magnetic impurity scattering induced by the molecular spin doping. By measuring the spin-orbit torque generated by Pt doped with molecular spins, we found that the spin Hall effect is robust against the magnetic impurity scattering, showing that the significant spin-orbit coupling dominates the charge-to-spin conversion in Pt. These results demonstrate that the molecular spin doping paves the way to explore spin-orbitronics phenomena.

Original languageEnglish
Pages (from-to)2098-2103
Number of pages6
JournalACS Applied Electronic Materials
Volume2
Issue number7
DOIs
Publication statusPublished - 2020 Jul 28

Keywords

  • self-assembled monolayers
  • spin Hall effect
  • spin-orbit torque
  • spintronics
  • weak antilocalization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrochemistry

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