Effect of Quench Treatment on Fe/Mo Order and Magnetic Properties of Double Perovskite Sr₂FeMoO₆

【摘要】 A quench-treatment technique is used to prepare a high-quality polycrystalline sample of double perovskite Sr₂FeMoO₆（SFMO）.X-ray powder diffraction analysis reveals that the sample has a single phase and exhibits I4/m symmetry.The cation order η of the sample increases to 98.9（2）%from 94.2（3）%,which is prepared by the traditional sol-gel method.The initial magnetization isotherm of the sample is detected at 300 K.Unit-cell magnetization for the current sample is 1.332 μ_B at 300 K,and the one for the traditional sol-gel method sample is0.946 μ_B.Unit-cell magnetization is enhanced to 40.80%by the quench-treatment technique.Quench treatment is an effective method of enhancing the Fe/Mo order and magnetic properties of double perovskite SFMO.更多还原

【Abstract】 A quench-treatment technique is used to prepare a high-quality polycrystalline sample of double perovskite Sr₂FeMoO₆（SFMO）.X-ray powder diffraction analysis reveals that the sample has a single phase and exhibits I4/m symmetry.The cation order η of the sample increases to 98.9（2）%from 94.2（3）%,which is prepared by the traditional sol-gel method.The initial magnetization isotherm of the sample is detected at 300 K.Unit-cell magnetization for the current sample is 1.332 μ_B at 300 K,and the one for the traditional sol-gel method sample is0.946 μ_B.Unit-cell magnetization is enhanced to 40.80%by the quench-treatment technique.Quench treatment is an effective method of enhancing the Fe/Mo order and magnetic properties of double perovskite SFMO.更多还原