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

Abstract

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.

6 pages, 2 figures, to appear in a special issue of Physica B, proceedings of the 2nd Hiroshima Workshop on Transport and Thermal Properties of Advanced Materials (Aug. 2002; Hiroshima, Japan)

References in corpus (1)

• Electronic structures of doped anatase $\mathrm{Ti}{\mathrm{O}}_2$: $\mathrm{T}{\mathrm{i}}_{1-\mathrm{x}}{\mathrm{M}}_{\mathrm{x}}{\mathrm{O}}_2$ (M=Co, Mn, Fe, Ni)

Cited by in corpus (1)

• Spintronic and electrochromic device based on Li-intercalated transition-metal doped anatase $\mathrm{Ti}{\mathrm{O}}_2$