Abstract
We have studied magnetism in Ti1 - xCoxO 2 - δ thin films with various x and δ by soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2, 3 absorption edges. The estimated ferromagnetic moment by XMCD was 0.15-0.24μB/Co at the surface, while in the bulk it was 0.82-2.25μB/Co, which is in the same range as the saturation magnetization of 1.0-1.5μB/Co. These results suggest an intrinsic origin of the ferromagnetism. The smaller moment of the Co atom at the surface is an indication of a magnetically dead layer of a few nanometers thick at the surface of the thin films.
Original language | English |
---|---|
Article number | 176001 |
Journal | Journal of Physics Condensed Matter |
Volume | 23 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2011 May 4 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics