Self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles for spintronic applications

Chengpeng Jiang, Chi Wah Leung, Philip W.T. Pong

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Controlled self-assembly of multi-component magnetic nanoparticles could lead to nanomaterial-based magnetic devices with novel structures and intriguing properties. Herein, self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles (CNPs) with hetero-dimeric shapes were fabricated using interfacial assembly method. The CNP-assembled thin films were further transferred to patterned silicon substrates followed by vacuum annealing, producing CNP-based magnetoresistive (MR) devices. Due to the presence of intra-particle interfaces and inter-particle barriers, an enhanced MR ratio and a non-linear current-voltage relation were observed in the device. The results of this work can potentially pave the way to the future exploration and development of spintronic devices built from composite nanomaterials.

Original languageEnglish (US)
Pages (from-to)692-696
Number of pages5
JournalApplied Surface Science
Volume419
DOIs
StatePublished - Oct 15 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Keywords

  • Interfacial assembly
  • Magnetic nanoparticle
  • Magnetoresistance
  • Material interface
  • Nanoparticle thin film
  • Spintronics

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