Gigantic magneto-optical effects in multilayer assemblies of two-dimensional titania nanosheets

Minoru Osada*, Yasuo Ebina, Kazunori Takada, Takayoshi Sasaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

135 Citations (Scopus)


The gigantic magneto-optical effects in multilayers of two-dimensional (2D) semiconductor titania nanosheets, were analyzed. T0.8Co 0.2O2 was chosen to serve as a magnetic layer in multilayer assemblies because titania nanosheets can be heavily substituted by 3D magnetic elements. In these nanosheets, the film shows pronounced magnetic circular dichroism (MCD) structures around the absorption edge at 4.1 and 4.6 eV, which are closely correlated with critical points in absorption spectrum. The magneto-optical Kerr measurements exhibit that Co-substituted titania nanosheets act as nanoscale ferromagnetic layers at room temperature (RT), and their multilayer assemblies exhibit robust MCD near the absorption edge at 260 nm.

Original languageEnglish
Pages (from-to)295-299
Number of pages5
JournalAdvanced Materials
Issue number3
Publication statusPublished - 2006 Feb 3
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science


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