Synthesis and characterization of Sr₂Ir_{1鈭?span style='font-style: italic'>x}M_xO₄ (M=Ti, Fe, Co) solid solutions

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• 作者：Alvin J. Gatimu ; Romain Berthelot ; Sean Muir ; Arthur W. Sleight ; M.A. Subramanian ; ^{mas.subramanian@oregonstate.edu}
• 关键词：Sr2IrO4 ; Solid-solution ; K2NiF4-type structure
• 刊名：Journal of Solid State Chemistry
• 出版年：2012
• 期刊代码：130_00224596
• 类别：ch
• 出版时间：June, 2012
• 卷：190
• 期：Complete
• 页码：257-263
• 文件大小：1234 K

摘要

The effects of Ti, Fe and Co substitutions for Ir on the structure and on the physical properties of Sr₂IrO₄ are investigated. A complete solid solution Sr₂Ir_1鈭?em>xTi_xO₄ is obtained while both Fe and Co doping are relatively limited. In each case however, the c-axis cell parameter and the initial IrO₆ octahedra tilting decreases with substitution. Doping with Ti, Fe and Co results in a decrease of the magnetic susceptibility and in an increase in the paramagnetic effective moment for Co and Fe doped samples and a suppression of the weak ferromagnetic ordering observed for Sr₂IrO₄.