TY - JOUR
T1 - Magneto-optical effect and ferromagnetic resonance of Bi-Fe garnet for high frequency electromagnetic sensor
AU - Adachi, N.
AU - Yogo, K.
AU - Ota, T.
AU - Takahashi, M.
AU - Ishiyama, K.
N1 - Funding Information:
This work was supported by the Strategic Information and Communications R&D Promotion Programme (SCOPE) of the Ministry of Internal Affairs and Communications of Japan. The authors would like thank staff members of the Institute of Molecular Science for FMR measurements. The authors would also like than to Professor Ishibashi (Nagaoka University ofTechnology) for useful discussions.
PY - 2011/4/1
Y1 - 2011/4/1
N2 - In order to develop a new probe sensor for high frequency electromagnetic field generated around integrated electric circuits, we have synthesized thermally nonequilibrium Bi3Fe5O12 (BIG) and Bi3Fe5-xGaxO12 [(BIGG), x 0.2, 0.5, 1.0] films from metalorganic decomposition technique. The BIG materials are famous for the largest magneto-optical (MO) effect in visible light region. Ga substitutions are expected to increase the sensitivity of the MO effect to magnetic fields. For the preparation of the films, metalorganic solutions were spin coated on the garnet single-crystal substrates and then were annealed in the furnace. The optimized annealing temperature for BIG and BIGG is determined to be around 480°C. The BIG film showed the largest Faraday rotation of approximately 6°/μm at 630 nm. The Ga substitution increases the change ratio of the Faraday rotation to the magnetic field from approximately 5 to 11 × 10-3 deg/mOe. The half width of the ferromagnetic resonance (FMR) line shape of the BIG was approximately 200 Oe. Due to the Ga substitution, the minimum half width became 28 Oe. The sharp resonance will be an advantage for MO imaging using FMR phenomena.
AB - In order to develop a new probe sensor for high frequency electromagnetic field generated around integrated electric circuits, we have synthesized thermally nonequilibrium Bi3Fe5O12 (BIG) and Bi3Fe5-xGaxO12 [(BIGG), x 0.2, 0.5, 1.0] films from metalorganic decomposition technique. The BIG materials are famous for the largest magneto-optical (MO) effect in visible light region. Ga substitutions are expected to increase the sensitivity of the MO effect to magnetic fields. For the preparation of the films, metalorganic solutions were spin coated on the garnet single-crystal substrates and then were annealed in the furnace. The optimized annealing temperature for BIG and BIGG is determined to be around 480°C. The BIG film showed the largest Faraday rotation of approximately 6°/μm at 630 nm. The Ga substitution increases the change ratio of the Faraday rotation to the magnetic field from approximately 5 to 11 × 10-3 deg/mOe. The half width of the ferromagnetic resonance (FMR) line shape of the BIG was approximately 200 Oe. Due to the Ga substitution, the minimum half width became 28 Oe. The sharp resonance will be an advantage for MO imaging using FMR phenomena.
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U2 - 10.1063/1.3556709
DO - 10.1063/1.3556709
M3 - Article
AN - SCOPUS:79955368640
SN - 0021-8979
VL - 109
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 7
M1 - 07A506
ER -