Ferromagnetism in two-dimensional Ti0.8 Co0.2 O2 nanosheets

M. Osada*, Y. Ebina, K. Fukuda, K. Ono, K. Takada, K. Yamaura, E. Takayama-Muromachi, T. Sasaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


We have investigated magnetic and magneto-optical properties of two-dimensional (2D) Ti0.8 Co0.2 O2 nanosheet, a new nanosized titanium oxide derived from layered titanates by exfoliation. Despite heavy doped 2D system in the dielectric ground, the multilayer films of Ti0.8 Co0.2 O2 nanosheets exhibit room-temperature ferromagnetism with magnetic moment of 1.4 μB Co. We also observe robust magnetic circular dichroism near the absorption edge at 4 eV, indicating a strong spin polarization in this 2D system. The first-principles study of Ti0.8 Co0.2 O2 nanosheet characterizes the ferromagnetic state with a spin-orbit-induced anisotropy.

Original languageEnglish
Article number153301
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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