Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys

Jong Il Park, Nam Jung Kang, Sang Min Lee, Sehun Kim, S. J. Oh, H. C. Ri, Jinwoo Cheon

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Synthesis of 'Solid solution' and 'Core-shell' types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.

Original languageEnglish
Pages (from-to)235-240
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume721
Publication statusPublished - 2002 Jan 1
EventMagnetic and Electronic Films - Microstructure, Texture and Application to Data Storage - San Francisco, United States
Duration: 2002 Apr 12002 Apr 4

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Park, J. I., Kang, N. J., Lee, S. M., Kim, S., Oh, S. J., Ri, H. C., & Cheon, J. (2002). Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys. Materials Research Society Symposium - Proceedings, 721, 235-240.