Premium
Nano‐Materials Design for High‐ T C Ferromagnets of Ti 1‐x Co x O 2 Nanosheets
Author(s) -
Osada Minoru,
Sasaki Takayoshi,
Ono Kanta
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2012.02783.x
Subject(s) - nanosheet , ferromagnetism , materials science , nanomaterials , doping , magnetic moment , nanotechnology , metal , condensed matter physics , optoelectronics , metallurgy , physics
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‐x Co x O 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‐x Co x O 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.