Li intercalation effects on magnetism in undoped and Co-doped anatase TiO$_2$

Details Li intercalation effects on magnetism in undoped and Co-doped anatase TiO$_2$ Li intercalation effects on magnetism in undoped and Co-doped anatase TiO$_2$

2002-09-11

arxiv.org/abs/cond-mat/0209253v1

Physics

Condensed Matter

Materials Science

6 pages, 2 figures, to appear in a special issue of Physica B, proceedings of the 2nd Hiroshima Workshop on Transport and Ther

Scientific paper

10.1016/S0921-4526(02)01824-0

The effects of $n$-type carrier doping by Li intercalation on magnetism in undoped and Co-doped anatase TiO$_2$ are investigated. We have found that doped $n$-type carriers in TiO$_2$ are localized mainly at Ti sites near the intercalated Li. With increasing the intercalation, local spins are realized at Ti. In the case of Co-doped TiO$_2$, most of the added $n$-type carriers fill the Co 3$d$ bands and the rest are localized at Ti. Therefore, Co magnetic moment vanishes by Li intercalation to have a nonmagnetic ground state.

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