Simultaneous luminescence modulation and magnetic field detection via magneto-optical response of Eu3+-doped NaGdF4 nanocrystals
Abstract
Non-agglomerated and uniform Eu3+-doped NaGdF4 nanocrystals were synthesized via a facile one-step precipitation method at room temperature. Under pulsed magnetic fields, the luminescence properties of the as-prepared samples have been recorded and discussed in detail. Particularly, “controllable eliminating luminescence” of 5D0–7F0 transition in Eu3+ was achieved during the magneto-optical interaction. Magnetic field assisted cross-relaxation of excited electrons was derived from Zeeman splitting of the higher 5D energy level, and the magnetic confinement of f electron wave functions was proposed which were responsible for the change in luminescence intensity with a variation of magnetic field strength. The characteristic variation of the emission band under pulsed magnetic fields promises an optical probe for magnetic field detection.
- This article is part of the themed collection: 2015 Journal of Materials Chemistry C Hot Papers