Title :
Sol–Gel Synthesis, Characterization, and Magnetic Properties of Double-Layered Perovskite Manganite La1.25Sr1.75Mn2O7
Author :
Hue, D.T.M. ; Manh, T.V. ; Anh, L.H. ; Hong, L.V. ; Phan, M.H. ; Huyen, P.T. ; Chinh, H.D.
Author_Institution :
Sch. of Chem. Eng., Hanoi Univ. of Sci. & Technol., Hanoi, Vietnam
Abstract :
Bilayered perovskite manganites of the composition La1.25Sr1.75Mn2O7 (LSMO) were synthesized successfully by the sol-gel method. The effects of pH concentration, calcination temperature, and time on the phase formation, structure, and magnetic properties of the material were systematically investigated. X-ray diffraction and Rietveld refinement analysis revealed that the single phase of LSMO was only obtained in samples sintered at a temperature as high as 1250°C. The best magnetic properties were achieved in samples with pH = 7, calcinated at 1450°C for 10 h. Our studies show that the pH concentration, calcination temperature, and time are important factors in tailoring the magnetic properties of double-layered perovskite manganites.
Keywords :
X-ray diffraction; calcination; lanthanum compounds; magnetisation; pH; sintering; sol-gel processing; strontium compounds; La1.25Sr1.75Mn2O7; Rietveld refinement analysis; X-ray diffraction; bilayered perovskite manganites; calcination temperature; double-layered perovskite manganite; magnetic properties; pH concentration; phase formation; sintering; sol-gel synthesis; structural properties; temperature 1250 degC; temperature 1450 degC; time 10 h; Calcination; Magnetic properties; Magnetic separation; Magnetization; Materials; Temperature; Temperature measurement; Double layered; Ruddlesden??Popper (RP); perovskite manganite; sol??gel;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2308482
