We present materials design of high-T C ferromagnetic nanomaterials based on first-principles calculations. Two-dimensional (2D) titania nanosheet, a recently discovered room-temperature (RT) ferromagnetic nanomaterial, is an important target for 2D ferromagnets. In Ti 1-xCo xO 2 nanosheets with Co 2+ oxidation state, the ferromagnetic states are highly stabilized up to x = 0.5 with a modest doping dependence of magnetic moment (~1 μ B/Co). Moreover, we find that tailoring properties could be achieved by tuning Co oxidation states, and the optimally doped Ti 1-xCo xO 2 nanosheets (Co 3+; x = 0.125, 0.25) are found to be an excellent RT half-metallic ferromagnet with a large magnetic moment (~4 μ B/Co). 2D nanosheet is therefore expected to provide a very useful platform for nanoscale spinelectronics devices.
|ジャーナル||International Journal of Applied Ceramic Technology|
|出版ステータス||Published - 2012 9月|
ASJC Scopus subject areas