Effect of oxygen substitution by nitrogen on magnetic and transport properties in Sr₂FeMoO₆ compound

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• 作者：Guoyan Huo ; ^{huoertang@yahoo.com.cn} ; ^{guoyanhuo@yahoo.com.cn} ; Jingjuan Wen ; Chenghui Zhang ; Minghui Ren
• 关键词：Ceramic composites ; Crystal structure ; Magnetic materials ; Electrical transport behavior
• 刊名：Ceramics International
• 出版年：2012
• 出版时间：March 2012
• 年：2012
• 卷：38
• 期：2
• 页码：1359-1363
• 全文大小：320 K

文摘

The result of Fullprof_suite refinement shows that the structure of Sr₂FeMo(O_0.889N_0.111)₆ is assigned to tetragonal system with space group I4/m and its cell parameters are a = 0.559250(8) nm and c = 0.789842(19) nm. The M-T curve demonstrates the magnetic transition temperature being over 300 K. Isothermal magnetization shows that the saturation and spontaneous magnetization are 1.29 and 0.87 ¦Ì_B/fu at 300 K, respectively. The sample shows a large magnoresistance in a 0.5 T magnetic field. The electrical transport behavior in the temperature range from 108 to 274 K is dominated by electron-phonon scattering under a zero magnetic field. However, under a magnetic field of 0.5 T the electron-electron and electron-magnon scattering control electrical transport behavior in the temperature range from 145 to 267 K and electrical transport property is governed by electron-phonon scattering in the temperature region of 97-130 K.