Synthesis and characterization of layered perovskite oxides (La, Sr)n + 1(Ti, Cr)nO3n + 1 (n = 1, 2)

被引：0
|
作者：
Sushma Sharma
Arun Mahajan
Suram Singh
Rajinder Singh
Devinder Singh
机构：
[1] University of Jammu,Department of Chemistry
来源：
Ionics | 2013年 / 19卷
关键词：
Layered perovskite oxides; XRD; Electrical properties; Magnetic properties;
D O I：
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学科分类号：
摘要：
We report here the synthesis of layered perovskite oxides of the composition La0.5Sr1.5Ti0.5Cr0.5O4 and LaSr2TiCrO7 by conventional solid-state reaction method. Results of XRD analysis show that the phases crystallize with tetragonal unit cell in the space group I4/mmm. Both phases behave as insulators and the linearity of log ρ versus T−1/4 plot in the temperature range 150–350 K suggests that the electronic conduction occurs by Mott’s variable range hopping mechanism. The antiferromagnetic interactions observed for the samples arise from Cr3+–O–Cr3+ superexchange interaction.
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页码：505 / 509
页数：4
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