Abstract
We have fabricated high quality NaNbO3:Eu3+ nano-crystals based on the Pechini sol-gel method and realized its magneto-optical effect under external pulsed magnetic field. Our results show that magnetic field can induce the suppression of luminescence, the splitting of peaks, and shifting of peak locations due to the expansion of electric dipole emission in Europium ions, and further demonstrate that the magnetic dipole emission plays an insignificant role in effect on the magnetic dipole emission for Eu3+:5D0 → 7F1, 5D0 → 7F3 transitions in NaNbO3:Eu3+ nano-crystals. These magnetic-optical interactions are attributed to the results of the Zeeman effect by high magnetic field that could result in the change of the symmetry of Eu3+ ions, and there is different sensitivity to changes of symmetry for Eu3+:5D0 → 7FJ (J = 1–4) transitions in NaNbO3 nano-crystals. This work might provide a viable magneto-optical approach in tuning the optical properties (luminescence intensity, peak location, profile, etc) of the rare-earth ions doped nano-particles.
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