材料科学
凝聚态物理
兴奋剂
铁磁性
大气温度范围
微晶
可变距离跳频
磁矩
阿累尼乌斯方程
金属-绝缘体过渡
转变温度
金属
活化能
化学
热传导
冶金
复合材料
物理
热力学
光电子学
物理化学
超导电性
作者
Yanliang Liu,Zhe Zhang,Jiecheng Lv,Peihua Qian,Hong-Ling Cai,X. S. Wu
摘要
Effects of Sn doping at Ru site on the structural, magnetic, and transport behavior of polycrystalline SrRu1−xSnxO3 (x ≤ 0.1) have been investigated here. Substitution of Sn4+ for Ru4+ remains the same crystal symmetry with that of Sn-free SrRuO3, while induces the Ru(Sn)O6 octahedral distortions. Samples with the low doping concentration (x ≤ 0.08) show a metallic behavior at high temperature, while a metal to insulator transition occurs at low temperature. On the other hand, an insulator behavior is detected for sample with x = 0.1, which follows Arrhenius-type process in the temperature range of 80–140 K and Mott's variable range hopping model in the temperature range of 140–300 K. Further, we find that Sn4+ has a significant effect on the magnetic behavior of Sn doping in SrRuO3 where ferromagnetic transition temperature and magnetic moment decrease rapidly due to octahedral distortion and site dilution.
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