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Full-Text Articles in Physics
Spectral Engineering Of Optical Fiber Preforms Through Active Nanoparticle Doping, T. Lindstrom, E. Garber, D. Edmonson, T. Hawkins, Y. Chen, G. Turri, M. Bass, J. Ballato
Spectral Engineering Of Optical Fiber Preforms Through Active Nanoparticle Doping, T. Lindstrom, E. Garber, D. Edmonson, T. Hawkins, Y. Chen, G. Turri, M. Bass, J. Ballato
Publications
Europium doped alkaline earth fluoride [Eu:AEF2 (AE = Ca, Sr, Ba)] nanoparticles were synthesized and systematically incorporated into the core of modified chemical vapor deposition (MCVD)-derived silica-based preforms by solution doping. The resulting preforms were examined to determine the impact of the nanoparticles chemistry on the spectroscopic behavior of the glass. The dominant existence of Eu3+ was demonstrated in all preforms, which is in contrast to conventional solution doped preforms employing dissolved europium salts where Eu2+ is primarily observed. Raman spectroscopy and fluorescence lifetime measurements indicated that the nanoparticles composition is effective in controlling, at a local chemical and structural …
Structural And Magnetic Characterization Of Bi_{0.9}Ca_{0.1}Fe_{0.98}X_{0.02}O_3 (X = Mg, Al, Ti, V) Polycrystalline Multiferroic Compounds, Mansour Al-Haj
Structural And Magnetic Characterization Of Bi_{0.9}Ca_{0.1}Fe_{0.98}X_{0.02}O_3 (X = Mg, Al, Ti, V) Polycrystalline Multiferroic Compounds, Mansour Al-Haj
Turkish Journal of Physics
The multiferroic compounds Bi_{0.9}Ca_{0.1}Fe_{0.98}X_{0.02}O_3, X = Mg, Al, Ti, V, were prepared by the solid state reaction method and were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometry, and differential scanning calorimetry. The compounds were found to have the rhombohedral perovskite-like structure, accompanied by the existence of small amounts of the usual impurity phases Bi_2Fe_4O_{9} and Bi_{25}FeO_{40}. The appearance of weak ferromagnetism is due to partial destruction of the spiral spin structure due to lattice distortion and suppression of oxygen vacancies. The magnetic transition temperatures of the compounds are 342, 346, 349, and 345 °C, respectively.