Zero-field electron Larmor precession in NiFe/SiN/GaAs nanohybrid structure at room temperature

Kazuhiro Nishibayashi, Tadashi Kawazoe, Shin Saito, Tetsuji Mori, Hiroaki Fukuda

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate the spin dynamics of a NiFe/SiN/GaAs nanohybrid structure, in which the volume of NiFe is significantly reduced by ion milling. The photogenerated GaAs electron spins induce the electron Larmor precession with a long decay component (LDC) with a time constant τLDC of 550 ps under zero field at room temperature, indicating the presence of an effective magnetic field. The LDC reflects the relaxation of NiFe magnetization, whose time constant is modulated by the inner product of NiFe magnetization and GaAs electron spins in the external field. These results indicate the existence of an exchange interaction between the NiFe magnetization and GaAs electron spins.

Original languageEnglish
Article number063003
JournalApplied Physics Express
Volume11
Issue number6
DOIs
Publication statusPublished - 2018 Jun

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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