Abstract
In this work, we present the dynamical Faraday rotation of a terbium metaborate glass (25Tb2O3-75B2O 3) modified with Mn2+ ions in use of pulsed magnetic fields, which was reached up to ∼16 T. The superexchange couplings of Tb3+-O2--Tb3+ or Tb3+-O2--Mn2+ were magnetooptically observed at lower temperature. In particular, the enhancement of the Faraday rotation effect was obtained at 15 K with the repetitional operations of the 16-T pulsed magnetic fields, resulting in the destroyment of the dimer couplings. When the operated glasses were heated back to 300 K, only the Tb2O3-B2O3: Mn2+ exhibited a significant change in the Faraday rotation.
[IEEE ]
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