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Far-Infrared Ferromagnetic Resonance of Magnetic Garnet for High Frequency Electromagnetic Sensor

Far-Infrared Ferromagnetic Resonance of Magnetic Garnet for High Frequency Electromagnetic Sensor

Authors :
Toshitaka Ota
Hiroyasu Ota
Daisuke Uematsu
Kazushi Ishiyama
Hitoshi Ohta
Masanori Takahashi
Ken Ichi Arai
Susumu Okubo
Nobuyasu Adachi
S Fujisawa
Katsumi Kawasaki
Source :
IEEE Transactions on Magnetics. 46:1986-1989
Publication Year :
2010
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2010.

Abstract

For the sensor probe of high frequency magnetic field in GHz region, films were prepared by liquid phase epitaxy technique and ferromagnetic resonances were investigated in high frequency region. Magneto-optical (MO) effect of magnetic garnet was utilized for the imaging sensor of the magnetic field distribution. However, for the application to the characterization of high frequency magnetic field in the GHz frequency region, usual MO measurements are difficult to detect the magnetic filed as the decreasing of the permeability of magnetic garnet. Magnetic resonance is an effective way to induce magnetic moment and enhance the magnetooptical effect in high frequency region of GHz order. In order to understand the possibility of magnetic field sensor of high frequency in detail, far-infrared magnetic resonances were measured at the high frequencies up to 315 GHz in pulsed high magnetic field. Taking account into sensitivity of MO signals and magnetic resonance intensities, magnetooptical method using a garnet film is effective at the frequencies below 100 GHz.

Details

ISSN :
00189464
Volume :
46
Database :
OpenAIRE
Journal :
IEEE Transactions on Magnetics
Accession number :
edsair.doi...........3aee7cf63847036ef731cce993711387
Full Text :
https://doi.org/10.1109/tmag.2010.2041328