论文标题
压力对碳掺杂EUB的电运性能的影响
Effect of pressure on electric transport properties of carbon-doped EuB6
论文作者
论文摘要
我们报告了外部压力对EUB5.99C0.01的电阻率的影响，该化合物由于碳含量的波动而被认为本质上是不均匀的。我们的结果表明，低温电阻率最大向较低的温度随施加压力而言，与报道的化学计量EUB6的行为相反。这种定性差异的起源与与铁磁体排序不兼容的相量分数的增加（起源于碳浓度相对较高的区域），并具有增强的压力。我们的结果支持最近的提议，即富含碳的区域强烈影响碳掺杂的EUB6的磁转运性能，例如它们起垫片的作用，从而阻止了铁磁相的渗透。
We report about influence of external pressure on electrical resistivity of EuB5.99C0.01, the compound believed to be intrinsically inhomogeneous due to fluctuation of carbon content. Our results show that the low-temperature resistivity maximum shifts to lower temperature with applied pressure, opposite to the behavior reported for stoichiometric EuB6. The origin of such qualitative difference we associate with the increasing volume fraction of the phase that is not compatible with ferromagnetic ordering (originating in regions with relatively higher carbon concentratio) with enhancing pressure. Our results support a recent proposition that carbon-rich regions strongly influence magnetotransport properties of carbon-doped EuB6, such as they play a role of spacers, which prevent percolation of ferromagnetic phase.
