Magneto-optical effects in superlattice assemblies of ferromagnetic nanosheets

Minoru Osada; Yasuo Ebina; Kazunori Takada; Takayoshi Sasaki

doi:10.4028/0-87849-449-9.15

Magneto-optical effects in superlattice assemblies of ferromagnetic nanosheets

Minoru Osada, Yasuo Ebina, Kazunori Takada, Takayoshi Sasaki

Research output: Contribution to journal › Article

Abstract

We have demonstrated a fabrication procedure for spin-electronic devices by using two-dimentional titania nanosheets. Magneto-optical Kerr measurements demonstrate that Co-substituted titania nanosheets (Ti_0.8Co _0.2O₂) act as nanoscale ferromagnetic layers at room temperature, and their multilayer-assemblies exhibit robust magnetic circular dichroism (10⁴-10⁵ deg/cm) near the absorption edge at 260 nm, an operating wavelength being the shortest attained so far. The availability of ferromagnetic nanostructures and their molecule-level assembly allow the rational design and construction of high-efficiency magneto-optical devices by forming superlattices.

Original language	English
Pages (from-to)	15-18
Number of pages	4
Journal	Key Engineering Materials
Volume	350
DOIs	https://doi.org/10.4028/0-87849-449-9.15
Publication status	Published - 2007
Externally published	Yes

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Keywords

Ferromagnetism
Layer-by-layer assembly
Magneto-optical effect
Titania nanosheet

ASJC Scopus subject areas

Ceramics and Composites
Chemical Engineering (miscellaneous)

Cite this

Osada, M., Ebina, Y., Takada, K., & Sasaki, T. (2007). Magneto-optical effects in superlattice assemblies of ferromagnetic nanosheets. Key Engineering Materials, 350, 15-18. https://doi.org/10.4028/0-87849-449-9.15

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AB - We have demonstrated a fabrication procedure for spin-electronic devices by using two-dimentional titania nanosheets. Magneto-optical Kerr measurements demonstrate that Co-substituted titania nanosheets (Ti0.8Co 0.2O2) act as nanoscale ferromagnetic layers at room temperature, and their multilayer-assemblies exhibit robust magnetic circular dichroism (104-105 deg/cm) near the absorption edge at 260 nm, an operating wavelength being the shortest attained so far. The availability of ferromagnetic nanostructures and their molecule-level assembly allow the rational design and construction of high-efficiency magneto-optical devices by forming superlattices.

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10.4028/0-87849-449-9.15