Eu³⁺ doped β-NaGdF₄ microcrystals were prepared by using an L-lysine-assisted hydrothermal synthetic method and the morphology evolution was successfully controlled. Hierarchical β-NaGdF₄:Eu³⁺ microcrystals with different morphologies were obtained by changing the moles of L-lysine and the volume of H₂O, respectively. The photoluminescence properties of the β-NaGdF₄:Eu³⁺ samples with different morphology were comparatively discussed, in which the hollow hexagonal tube-like β-NaGdF₄:Eu³⁺ exhibited the strongest fluorescence emission intensity owing to the high crystallinity. The characteristic luminescence properties of Tb³⁺-single doped, Yb³⁺/Er³⁺-, and Yb³⁺/Tm³⁺-codoped NaGdF₄ microcrystals obtained in the presence of L-lysine under hydrothermal condition were also investigated. The superparamagnetic performance of β-NaGdF₄:Eu³⁺ samples at 3 K were characterized in comparison to their paramagnetic property at 300 K, and the results indicated that all samples are paramagnetic at room temperature and the hollow tube-like β-NaGdF₄:Eu³⁺ microcrystals exhibits best saturation magnetization values of 111.11 emu/g at 3 K. The results imply that the morphology-tunable β-NaGdF₄:Eu³⁺ microcrystals are expected to have promising applications for micro/nano optical/magnetic functional devices.

的Eu ³⁺掺杂的β-NaGdF _4个通过使用L-赖氨酸辅助水热合成法和形态进化成功控制制备微晶。分层β-NaGdF ₄：Eu的³⁺通过改变L-赖氨酸的摩尔数和H的体积，得到具有不同形态的微晶₂分别O，。所述的光致发光特性β-NaGdF ₄：Eu的³⁺具有不同形态的样品比较讨论，其中，所述中空六角筒状β-NaGdF ₄：Eu的³⁺由于结晶度高，显示出最强的荧光发射强度。还研究了在水热条件下在L-赖氨酸存在下获得的Tb ^{3 +} -单掺杂，Yb ³⁺ / Er ³⁺ -和Yb ³⁺ / Tm ³⁺掺杂的NaGdF ₄微晶的特征发光性质。的超顺磁性性能β-NaGdF ₄：Eu的³⁺样品在3 K在300K进行表征相比于它们的顺磁性，结果表明，所有样品都在室温下和中空管状β-NaGdF顺磁性₄：欧盟³⁺微晶展品最好饱和磁化111.11鸸鹋/ g的3 K.值的结果意味着，形态可调β-NaGdF ₄：Eu的³⁺微晶预期具有微/纳米光学/磁功能的设备有前途的应用。