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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2006|
ASJC Scopus subject areas
- Condensed Matter Physics