Study On The Effect Of Transition Elements On The Optical And Magneto-optical Properties Of Diamagnetic Glass

The Verdet constant of diamagnetic glass has the characteristic of little affected by temperature,which makes it have great advantages in some complex environments.Diamagnetic glass doped with transition element nanomaterials has become one of the current research hotspots.Transition element ions usually have multiple valence states or coordination,and the electrons in the outermost d-orbit will interact with the surrounding chemical environment.V₂O₅ doped glass has semiconductor properties and ZnO doped glass has good antibacterial properties.However,the influence of their high polarizability and diamagnetic properties on reverse magnetic glass has not been studied.Mn-doped Bi₂Te₃ is both a topological insulator and a dilute magnetic semiconductor.Its interesting magnetic properties?due to d-sp exchange interaction and unique surface state?have aroused great interest.Nano-scale materials also contribute to the fast magneto-optical response,which gives the glass unique electrical,optical,and magnetic properties.Pb²⁺,Bi³⁺and Te⁴⁺ions have high polarizability and weak field strength.These ions have a pair of lone electrons outside the closed orbit,and may form a bond between the ions.Shows a dipole effect,so it has a strong diamagnetic performance.In this paper,the magneto-optical properties of three glass systems?PBBZA,TPB and PBBA?doped with nano V₂O₅,Bi_1.9Mn_0.1Te₃ and ZnO are study for first time.The three nanomaterials synthesized by hydrothermal method have the advantages of high purity,large specific surface area,few surface defects and smaller optical band gap compared with conventional materials.Using modern research methods such as XRD,SEM,FT-IR,Raman,UV-Vis and DSC,the influence factors of the doping amount of the three nanomaterials on the microstructure,spectrum and Verdet constant of the matrix were studied.The main conclusions are as follows:?1?In PBBZA glass doped with V₂O₅?0,0.2,0.5 and 1 mol%?,FT-IR and Raman spectra reveal the relationship between the content of[BiO₆],[BiO₃],[BO₄],[BO₃]groups and the doping amount.Absorption bands related to V⁴⁺ions appear in the absorption spectrum,and the presence of a small amount of V⁴⁺ions can improve the electron mobility.V₂O₅ doped glass has a smaller band gap due to the narrow band gap doping,electronic transitions and increased non-bridge oxygen.It is worth noting that the glass with a V₂O₅ doping amount of 1 mol%has the smallest band gap?2.40 eV?,the highest density?7.36 g/cm³?and the largest Verdet constant?0.1605min/G·cm?.?2?Because part of Bi³⁺in Bi₂Te₃ is replaced with Mn²⁺ion,Bi_1.9Mn_0.1Te₃ has characteristic Raman spectrum and good photocatalytic performance.In TPB glass doped with Bi_1.9Mn_0.1Te₃?0,2,5,and 7 mol%?,the glass doped with 7 mol%still has no obvious crystallization,indicating good compatibility between the doping and the matrix.Due to the extremely small bandgap doping,electronic transitions,and increased interaction between different spin orbits,a reduced bandgap and nonlinear magneto-optical response were observed in Bi_1.9Mn_0.1Te₃ doped glass.The 5 mol%Bi_1.9Mn_0.1Te₃ glass in this study has strong emission at 527 nm,good thermal stability at room temperature?132??and the highest Verdet constant?0.1928 min/G·cm,633nm?.?3?In PBBA glass doped with ZnO?0,3,6,8,10 mol%?,the changes of[BiO₆],[BiO₃],[BO₄]and[BO₃]groups can be clearly seen in the FT-IR spectrum,revealing the relationship between structure and doping amount.Due to the small band gap and large polarizability of nano-ZnO,the optical band gap of ZnO-doped glass is gradually decreasing.Vickers hardness reveals that ZnO doping can improve the connectivity of the glass network within a certain range and increase the Vickers hardness of the glass.It is worth noting that ZnO doped with 6mol%glass has a small optical band gap?2.34 e V?,the highest Vickers hardness?448 HV?and the largest Verdet constant?0.1521 min/G·cm,633nm?.?4?High Verdet constant glass has a fast magneto-optical response,which can meet the development requirements of miniaturization,high sensitivity and high power of the device.Comparing the three glasses,the TPB glass doped with 5mol%Bi_1.9Mn_0.1Te₃ obtained Verdet constant?0.1928 min/G·cm,633nm?and good thermal stability?132??of far high and other two groups of glasses.This high-quality diamagnetic glass is expected to be used in optical current sensors,isolators and photoluminescent devices.