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首页> 外文期刊>Journal of magnetism and magnetic materials >Magnetic and magneto-transport properties of double perovskite Ba_(2-x)Sr_xFeMoO_6 system
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Magnetic and magneto-transport properties of double perovskite Ba_(2-x)Sr_xFeMoO_6 system

机译：双钙钛矿Ba_（2-x）Sr_xFeMoO_6系统的磁和磁输运性质

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摘要

The structural magnetic and magneto-transport properties of double perovskite system Ba_(2-x)Sr_xFeMoO_6 (0≤x≤1.0) prepared in bulk polycrystalline form are reported in this paper. X-ray diffraction analysis showed that samples are single phase and the lattice constants decreases with increase in the Sr content. The degree of Fe-Mo ordering has been found decreasing in the series with an increase in the Sr content. Parent compound Ba_2FeMoO_6 exhibits saturation magnetic moment value of 3.54 μ_B/f.u. at 85 K in a magnetic field of 6000 Oe. Temperature dependence of resistivity shows metallic behavior for all the samples. The magneto-resistance (MR) of the compound with x = 0.4 is higher than that of the other samples. At room temperature this system shows a saturation magnetization value of 1.73 μ_B/f.u. and MR value of 7.08% (1T). The observed variations in the structural and magnetic properties are attributed to the change of chemical pressure due to the substitution of Sr in place of Ba. The effect of antisite disorder (ASD) defects on magneto-transport properties is studied in more detail.
机译：本文报道了以块状多晶形式制备的双钙钛矿体系Ba_（2-x）Sr_xFeMoO_6（0≤x≤1.0）的结构磁和磁输运性质。 X射线衍射分析表明样品是单相的，晶格常数随Sr含量的增加而降低。已经发现，随着Sr含量的增加，Fe-Mo的有序度降低。母体化合物Ba_2FeMoO_6的饱和磁矩值为3.54μB/ f.u。在85 O时在6000 Oe的磁场中。电阻率的温度依赖性显示了所有样品的金属行为。 x = 0.4的化合物的磁阻（MR）高于其他样品的磁阻。在室温下，该系统的饱和磁化强度值为1.73μB/ f.u。 MR值为7.08％（1T）。观察到的结构和磁性的变化归因于由于代替Ba替代Sr而引起的化学压力的变化。更详细地研究了反位错（ASD）缺陷对磁传输性能的影响。

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