|
|||||
|
|
Magnetic behaviour and DCEMS study of SnO2 films implanted with 57Fe |
|
| Authors: | K Nomura S Iio Y Hirose H Reuther A Nakanishi |
| Institution: | 1. School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan 2. School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan 3. Forschungszentrum Dresden-Rossendorf e.V., Postfach 510119, 01324, Dresden, Germany 4. Department of Physics, Shiga University of Medical Science, Seta, Otsu, Shiga, 520-2192, Japan |
| Abstract: | Fe implanted SnO2 films (5 × 1016 and 1 × 1017 57Fe ions/cm2) characterized by conversion electron Mossbauer spectroscopy (CEMS) are reviewed. The substrate temperatures affect the growth of precipitated iron oxides. The Fe ion implanted film at room temperature (RT) shows no Kerr effect and no magnetic sextet in CEM spectra. The SnO2 film implanted with 57Fe at the substrate temperature of 300 °C show a small Kerr effect although the magnetic sextet is not observed, but post-annealing results in the disappearance of the Kerr effect. This magnetism is considered to be due to defect induced magnetism. Some samples were measured by CEMS at 15 K. SnO2 (0.1 at %Sb and 3 at %Sb) films, implanted at 500 °C and the post-annealed samples, show RT ferromagnetism due to formation of clusters of magnetite and maghemite, respectively. The layer by layer analysis of these films within 100 nm in thickness has been done by depth sensitive CEMS (DCEMS) using a He + 5 % CH4 gas counter. The structures and compositions of Fe implanted SnO2 films, and the effects due to post-annealing were investigated. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |