Mossbauer studies of 57Fe-doped anatase TiO2

被引：20

作者：

Lee, HM ^{[1
]}

Kim, SJ ^{[1
]}

Shim, IB ^{[1
]}

Kim, CS ^{[1
]}

机构：

[1] Kookmin Univ, Dept Phys, Seoul 136702, South Korea

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2003年 / 39卷 / 05期

关键词：

anatase; diluted magnetic semiconductor (DMS); ferromagnetic; Mossbauer spectroscopy;

D O I：

10.1109/TMAG.2003.815712

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

(Ti1-xFeO2)-Fe-57 compounds were fabricated using the chemical solution method, and the crystal structure and ferromagnetic properties were investigated as a function of doped Fe-57 concentration. X-ray diffraction patterns showed a pure anatase single phase, without any segregation of Fe into particulates within the instrumental resolution limit. Magnetic properties were characterized by vibrating sample magnetometer and Mossbauer spectroscopy with a Co-57(Rh) source. With varying Fe-57 concentration, we could observe unusual magnetic phenomena in these materials. Doping Fe-57 into the TiO2 nonmagnetic semiconductor formed magnetic properties, but the gradual increase of Fe-57 concentration decreased rapidly the ferromagnetic properties rather than enhanced the ferromagnetic properties. This result reveals an interesting feature, there, is a critical limit of Fe-57 concentration to get ferromagnetic properties at room temperature.

引用

页码：2788 / 2790

页数：3

共 7 条

[1] Material design of half-metallic zinc-blende CrAs and the synthesis by molecular-beam epitaxy [J].