Far-infrared ferromagnetic resonance of magnetic garnet for high frequency electromagnetic sensor

Nobuyasu Adachi, Daisuke Uematsu, Toshitaka Ota, Masanori Takahashi, Kazushi Ishiyama, Katsumi Kawasaki, Hiroyasu Ota, Kenichi Arai, S. Fujisawa, Susumu Okubo, Hitoshi Ohta

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


For the sensor probe of high frequency magnetic field in GHz region, (BiLu)3 Fe5 O12 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.

Original languageEnglish
Article number5467586
Pages (from-to)1986-1989
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2010 Jun


  • Ferromagnetic resonance
  • Garnet film
  • High frequency
  • Magneto-optical effect


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