Gigantic magneto-optical effects induced by (FeCo) -cosubstitution in titania nanosheets

Minoru Osada; Masayuki Itose; Yasuo Ebina; Kanta Ono; Shigenori Ueda; Keisuke Kobayashi; Takayoshi Sasaki

doi:10.1063/1.2937094

Gigantic magneto-optical effects induced by (FeCo) -cosubstitution in titania nanosheets

Minoru Osada^*, Masayuki Itose, Yasuo Ebina, Kanta Ono, Shigenori Ueda, Keisuke Kobayashi, Takayoshi Sasaki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Magneto-optical Faraday effect has been investigated for 3d -transition-metal-substituted titania nanosheets Ti_1-xM _xO₂ (M=Fe,Co). In Ti_0.8 Co_0.2O ₂ and Ti_0.6 Fe_0.4O₂ nanosheets, a strong magneto-optical response (∼ 10⁴ deg/cm) appeared near the absorption edge at 260 nm. We find that tailoring magneto-optical properties could be achieved by (FeCo) cosubstitution and an optimally doped Ti _0.75 Fe_0.1Co_0.15O₂ nanosheet exhibits a gigantic magneto-optical response (∼ 10⁵ deg/cm) over the wide wavelength region (400-750 nm). By analyzing electronic structures from first-principle calculations, we have clarified that the d-d transitions are responsible for the gigantic signal in (FeCo) -cosubstituted nanosheets.

Original language	English
Article number	253110
Journal	Applied Physics Letters
Volume	92
Issue number	25
DOIs	https://doi.org/10.1063/1.2937094
Publication status	Published - 2008
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2937094

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title = "Gigantic magneto-optical effects induced by (FeCo) -cosubstitution in titania nanosheets",

abstract = "Magneto-optical Faraday effect has been investigated for 3d -transition-metal-substituted titania nanosheets Ti1-xM xO2 (M=Fe,Co). In Ti0.8 Co0.2O 2 and Ti0.6 Fe0.4O2 nanosheets, a strong magneto-optical response (∼ 104 deg/cm) appeared near the absorption edge at 260 nm. We find that tailoring magneto-optical properties could be achieved by (FeCo) cosubstitution and an optimally doped Ti 0.75 Fe0.1Co0.15O2 nanosheet exhibits a gigantic magneto-optical response (∼ 105 deg/cm) over the wide wavelength region (400-750 nm). By analyzing electronic structures from first-principle calculations, we have clarified that the d-d transitions are responsible for the gigantic signal in (FeCo) -cosubstituted nanosheets.",

author = "Minoru Osada and Masayuki Itose and Yasuo Ebina and Kanta Ono and Shigenori Ueda and Keisuke Kobayashi and Takayoshi Sasaki",

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T1 - Gigantic magneto-optical effects induced by (FeCo) -cosubstitution in titania nanosheets

AU - Osada, Minoru

AU - Itose, Masayuki

AU - Ebina, Yasuo

AU - Ono, Kanta

AU - Ueda, Shigenori

AU - Kobayashi, Keisuke

AU - Sasaki, Takayoshi

PY - 2008

Y1 - 2008

N2 - Magneto-optical Faraday effect has been investigated for 3d -transition-metal-substituted titania nanosheets Ti1-xM xO2 (M=Fe,Co). In Ti0.8 Co0.2O 2 and Ti0.6 Fe0.4O2 nanosheets, a strong magneto-optical response (∼ 104 deg/cm) appeared near the absorption edge at 260 nm. We find that tailoring magneto-optical properties could be achieved by (FeCo) cosubstitution and an optimally doped Ti 0.75 Fe0.1Co0.15O2 nanosheet exhibits a gigantic magneto-optical response (∼ 105 deg/cm) over the wide wavelength region (400-750 nm). By analyzing electronic structures from first-principle calculations, we have clarified that the d-d transitions are responsible for the gigantic signal in (FeCo) -cosubstituted nanosheets.

AB - Magneto-optical Faraday effect has been investigated for 3d -transition-metal-substituted titania nanosheets Ti1-xM xO2 (M=Fe,Co). In Ti0.8 Co0.2O 2 and Ti0.6 Fe0.4O2 nanosheets, a strong magneto-optical response (∼ 104 deg/cm) appeared near the absorption edge at 260 nm. We find that tailoring magneto-optical properties could be achieved by (FeCo) cosubstitution and an optimally doped Ti 0.75 Fe0.1Co0.15O2 nanosheet exhibits a gigantic magneto-optical response (∼ 105 deg/cm) over the wide wavelength region (400-750 nm). By analyzing electronic structures from first-principle calculations, we have clarified that the d-d transitions are responsible for the gigantic signal in (FeCo) -cosubstituted nanosheets.

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Gigantic magneto-optical effects induced by (FeCo) -cosubstitution in titania nanosheets

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