CaBaCo_(4)O_(7)has been widely studied because of its distinctive structure and magnetic properties.This study examined the influence of different cooling atmospheres on the structure,magnetic properties,and dielectri...CaBaCo_(4)O_(7)has been widely studied because of its distinctive structure and magnetic properties.This study examined the influence of different cooling atmospheres on the structure,magnetic properties,and dielectric behavior of CaBaCo_(4)O_(7).Samples were cooled under different atmospheric conditions to assess these influences.Our findings indicate that reduced oxygen content leads to increased lattice distortion.Since oxygen atoms play a crucial role in mediating magnetic exchange,oxygen deficiency disrupts long-range magnetic order and promotes short-range antiferromagnetic interactions.Additionally,the cooling atmosphere significantly impacts grain size,thereby affecting the dielectric constant and dielectric loss.In the argon-cooled CaBaCo_(4)O_(7)(Ar)sample,oxygen deficiency reduced dielectric permittivity and increased dielectric loss.展开更多
We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements,highlighting the domain-wall solitary pulses generated under the incoher...We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements,highlighting the domain-wall solitary pulses generated under the incoherent polarization coupling.By adjusting the pump power and the polarization state appropriately,bright and dark solitons can stably co-exist in the cavity,both centered at 1562.16 nm with a 3-dB spectral width of -0.15 nm and a repetition rate of 3.83 MHz.Moreover,the 0.8 mm long thulium-doped fiber(TDF)facilitated the mode-locking and self-starting of the laser.This is the first demonstration of a laser being used to generate bright and dark solitons synchronously while using TDF as the saturable absorber(SA).Except possessing the all-fiber structure,the laser exhibits good stability,which may have a significant influence on improvement of the pulse-laser design,and may broaden practical applications in optical sensing,optical communication,and soliton multiplexed systems.展开更多
基金Project supported by the Key Research Project of Colleges and Universities of Henan Province(Grant No.23A140017)the Research Project of Department of Science and Technology of Henan Province(Grant No.242102231072)+1 种基金the National Natural Sciences Foundation of China(Grant No.52402336)the special fund of the Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences“New magnetic materials and structural devices for 5G communication”(Grant No.E41602QB01).
文摘CaBaCo_(4)O_(7)has been widely studied because of its distinctive structure and magnetic properties.This study examined the influence of different cooling atmospheres on the structure,magnetic properties,and dielectric behavior of CaBaCo_(4)O_(7).Samples were cooled under different atmospheric conditions to assess these influences.Our findings indicate that reduced oxygen content leads to increased lattice distortion.Since oxygen atoms play a crucial role in mediating magnetic exchange,oxygen deficiency disrupts long-range magnetic order and promotes short-range antiferromagnetic interactions.Additionally,the cooling atmosphere significantly impacts grain size,thereby affecting the dielectric constant and dielectric loss.In the argon-cooled CaBaCo_(4)O_(7)(Ar)sample,oxygen deficiency reduced dielectric permittivity and increased dielectric loss.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11874040, 11904327, and 61905222)Foundation for Leading Talents of Minhang,Shanghaithe Specialized Research Fund for the Doctoral Program of Zhengzhou University of Light Industry (Grant No. 0170-13501050036)
文摘We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements,highlighting the domain-wall solitary pulses generated under the incoherent polarization coupling.By adjusting the pump power and the polarization state appropriately,bright and dark solitons can stably co-exist in the cavity,both centered at 1562.16 nm with a 3-dB spectral width of -0.15 nm and a repetition rate of 3.83 MHz.Moreover,the 0.8 mm long thulium-doped fiber(TDF)facilitated the mode-locking and self-starting of the laser.This is the first demonstration of a laser being used to generate bright and dark solitons synchronously while using TDF as the saturable absorber(SA).Except possessing the all-fiber structure,the laser exhibits good stability,which may have a significant influence on improvement of the pulse-laser design,and may broaden practical applications in optical sensing,optical communication,and soliton multiplexed systems.
