Anisotropy of magnetization-induced surface optical second harmonic generation from Co doped rutile TiO2

作者：Watanabe R^*; Tamura M; Yahata Y; Mizutani G; Suzuki T; Segawa Y; Matsumoto Y; Yamamoto Y; Koinuma H

来源：Applied Surface Science, 2009, 256(4): 1092-1095.

DOI：10.1016/j.apsusc.2009.05.073

• Magnetization-induced optical second harmonic generation (MSHG)
• Anisotropic surface magnetization
• Co doped rutile TiO2 (110)

We have investigated the surface magnetization anisotropy of 5 at% Co doped rutile TiO2 (1 1 0) using magnetization-induced optical second harmonic generation (MSHG) in the longitudinal Kerr configuration with an incident beam angle of 4 degrees. The MSH intensity pattern from the Co: TiO2 without surface Co clusters showed two anisotropic lobes at the second harmonic photon energy of 2(sic)omega: 3.13 eV. Since MSH intensity is proportional to surface magnetization, the result indicates an anisotropy of the surface magnetization of Co: rutile TiO2(1 1 0). This confirms the possibility that 5 at% Co: rutile TiO2(1 1 0) is a ferromagnetic dilutemagnetic semiconductor at its surface, as proposed in our previous paper.

• 出版日期2009-11-30