Magneto-Optical Effects in Superlattice Assemblies of Ferromagnetic Nanosheets


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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 (Ti0.8Co0.2O2) 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.



Edited by:

K. Katayama, K. Kato, T. Takenaka, M. Takata and K. Shinozaki




M. Osada et al., "Magneto-Optical Effects in Superlattice Assemblies of Ferromagnetic Nanosheets", Key Engineering Materials, Vol. 350, pp. 15-18, 2007

Online since:

October 2007




[1] S. J. Tans, A. R. M. Verschueren and C. Dekker, Nature 393, 49 (1999).

[2] X. Duan, Y. Huang, Y. Cui, J. Wang and C. M. Lieber, Nature 409, 66 (2001).

[3] From Dynamics to Devices: Directed Self-Assembly of Colloidal Materials (Ed. Grier, D. G. ), a special issue in MRS Bull. 23, 21 (1998).


[4] M. Osada, Y. Ebina, K. Takada and T. Sasaki, Adv. Mater. 18, 295 (2006).

[5] M. Osada, Y. Ebina, K. Fukuda, K. Ono, K. Takada, K. Yamaura, E. Takayama-Muromachi and T. Sasaki, Phys. Rev. B 73, 153301 (2006).


[6] T. Sasaki, M. Watanabe, H. Hashizume, H. Yamada and H. Nakazawa, J. Am. Chem. Soc. 1996, 118, 8329.

[7] T. Sasaki, Y. Ebina, T. Tanaka, M. Harada, M. Watanabe, G. Decher, Chem. Mater. 2001, 13, 4661.

[8] K. Ando, in Magneto-Optics, (Eds: S. Sugano, N. Kojima), Springer-Verlag, Berlin (2000).

[9] Y. Matsumoto, M. Murakami, T. Shono, T. Hasegawa, T. Fukumura, M. Kawasaki, P. Ahmet, T. Chikyow, S. Koshihara and H. Koinuma, Science 291, 854 (2001).

[10] H. Toyosaki, T. Fukumura, Y. Yamada, K. Nakajima, T. Chikyow, T. Hasegawa, H. Koinuma andM. Kawasaki, Nat. Mater. 3, 221 (2004).

[11] J. M. D. Coey, M. Venkatesan and C. B. Fitzgerald, Nat. Mater. 4, 173 (2005).

[12] K. Ueda, H. Tabata and T. Kawai, Science 280, 1064 (1998).

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