Abstract
In order to design a new multifunctional crystal with excellent ferroelectric and spectroscopic properties, experiments were carried out for Ho3+/Yb3+ co-doped Pb(Mg1/3Nb2/3)O3 -32PbTiO3 ferroelectric crystal using the flux method, the coercive field Ec of which is 11.86 kV/cm. Up-conversion luminescence emission bands, including an intense green emission band at 553 nm, a red band at 663 nm, and a weak infra-red band at 755 nm, are generated at 980 nm excitation. The main spectroscopic parameters, including radiative transition probability A(J′ − J), radiative lifetimes τrad, and branching ratios β, were predicted by applying Judd–Ofelt treatment. The obtained J-O intensity parameters are Ω2 = 0.531 × 10−20 cm2, Ω4 = 1.738 × 10−20 cm2, Ω6 = 0.530 × 10−20 cm2. The radiative lifetime of 5I7 level is 5.45 ms. The fluorescence lifetime of is 5F5 is 92.568 μs. The investigations show that Ho3+/Yb3+ co-doped Pb(Mg1/3Nb2/3)O3-0.32PbTiO3 crystal is a new type of multifunctional crystal integrating ferroelectric and spectroscopic properties, which has a potential application in the developing innovative multifunctional devices and lasers.
Highlights
In recent decades, relaxor ferroelectric single crystals represented by (1−x) Pb(Mg1/3 Nb2/3 )O3 -xPbTiO3 [PMN-PT] and Pb(Zn1/3 Nb2/3 )O3 -xPbTiO3 [PZN-PT] have triggered a revolution
They are regarded as potential materials in the medical ultrasonic probe, underwater acoustic transducer, and ultrasonic motor owing to their excellent electric properties [1,2,3]
PMN-PT and PZN-PT relaxor ferroelectric crystals do not contain luminescent activators, which limits their application in optical devices and opto-electric couplers
Summary
O3 -xPbTiO3 [PMN-PT] and Pb(Zn1/3 Nb2/3 )O3 -xPbTiO3 [PZN-PT] have triggered a revolution. They are regarded as potential materials in the medical ultrasonic probe, underwater acoustic transducer, and ultrasonic motor owing to their excellent electric properties [1,2,3]. The low coercive field Ec limits their applications in high-power devices. It is urgent to develop a new-type ferroelectric single crystal with high coercive field Ec. In addition, PMN-PT and PZN-PT relaxor ferroelectric crystals do not contain luminescent activators, which limits their application in optical devices and opto-electric couplers. Rare earth ions as solid solutions and impurity ions enter PMN-PT and PZN-PT crystals
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