Local light-induced magnetization using nanodots and chiral molecules

Oren Ben Dor, Noam Morali, Shira Yochelis, Lech Tomasz Baczewski, Yossi Paltiel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

Abstract

With the increasing demand for miniaturization, nanostructures are likely to become the primary components of future integrated circuits. Different approaches are being pursued toward achieving efficient electronics, among which are spin electronics devices (spintronics). In principle, the application of spintronics should result in reducing the power consumption of electronic devices. Recently a new, promising, effective approach for spintronics has emerged, using spin selectivity in electron transport through chiral molecules. In this work, using chiral molecules and nanocrystals, we achieve local spin-based magnetization generated optically at ambient temperatures. Through the chiral layer, a spin torque can be transferred without permanent charge transfer from the nanocrystals to a thin ferromagnetic layer, creating local perpendicular magnetization. We used Hall sensor configuration and atomic force microscopy (AFM) to measure the induced local magnetization. At low temperatures, anomalous spin Hall effects were measured using a thin Ni layer. The results may lead to optically controlled spintronics logic devices that will enable low power consumption, high density, and cheap fabrication.

Original languageAmerican English
Pages (from-to)6042-6049
Number of pages8
JournalNano Letters
Volume14
Issue number11
DOIs
StatePublished - 12 Nov 2014

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

Keywords

  • Spin
  • local
  • memory
  • organic spintronics
  • polarization

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