Gigantic Photomagnetic Effect at Room Temperature in Spiropyran-Protected FePt Nanoparticles

Takashi Yamamoto, Elena A. Yurieva, Kento Tsuda, Tomoko Hosomi, Sergey M. Aldoshin, Yasuaki Einaga

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A key issue in molecular electronics is the control of electronic states and properties by optical stimuli, which enables fast and high-density data storage. In this article, we report preparation of a photoswitchable room-temperature ferromagnetic material using FePt nanoparticles protected with a photochromic spiropyran ligand. Magnetic properties were examined with a field-dependent isothermal magnetization, and a photomagnetic effect was measured at room temperature. These measurements revealed room-temperature ferromagnetism and reversible switching of magnetization by 60% upon photochromic reaction of the spiropyran ligand. This gigantic photomagnetic effect is explained as spiropyran's large change in the dipole moment during photochromic reaction that tunes the magnitude of electron transfer at the interface.

Original languageEnglish
JournalPhysica Status Solidi - Rapid Research Letters
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

photomagnetic effects
Nanoparticles
nanoparticles
Magnetization
room temperature
Ligands
Molecular electronics
magnetization
ligands
Ferromagnetic materials
ferromagnetic materials
molecular electronics
Ferromagnetism
Dipole moment
Electronic states
data storage
Electronic properties
stimuli
Temperature
ferromagnetism

Keywords

  • Alloys
  • FePt
  • Nanoparticles
  • Photomagnetic effect
  • Spiropyran

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Gigantic Photomagnetic Effect at Room Temperature in Spiropyran-Protected FePt Nanoparticles. / Yamamoto, Takashi; Yurieva, Elena A.; Tsuda, Kento; Hosomi, Tomoko; Aldoshin, Sergey M.; Einaga, Yasuaki.

In: Physica Status Solidi - Rapid Research Letters, 2017.

Research output: Contribution to journalArticle

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