Data from: Cu1-xFexO: hopping transport and ferromagnetism

Single phase, sol-gel prepared Cu1-xFexO (0≤x≤0.125) powders are characterized in terms of structural, electronic and magnetic properties. Using dielectric and magnetic studies we investigate the coupling of electron and spin. The electrical conductivities and activation energies are studied with increasing Fe content. Modeling of experimental conductivity data emphasizes on a single hopping mechanism for all samples except x=0.125, which have two activation energies. Hole doping is confirmed by confirming a majority Fe3+ substitution of Cu2+ in CuO from X-ray photoelectron spectroscopy studies (XPS). Such a substitution results in stabilized ferromagnetism. Fe substitution introduces variation in coercivity as an intrinsic magnetic property in Fe-doped CuO, and not as a secondary impurity phase.

采用溶胶-凝胶法制备的单相Cu₁₋ₓFeₓO（0≤x≤0.125）粉体，从结构、电子与磁学性质三个维度开展了系统表征。本研究借助介电与磁学测试手段，探究了电子与自旋之间的耦合作用；随着铁（Fe）掺杂量的提升，对样品的电导率与活化能进行了详细分析。对实验电导率数据的建模结果显示，除x=0.125的样品外，其余所有试样的载流子输运均遵循单一跳跃机制，而x=0.125的样品则存在两个活化能。通过X射线光电子能谱（X-ray photoelectron spectroscopy, XPS）分析证实，绝大多数Fe³+取代了CuO晶格中的Cu²+位点，由此确认了空穴掺杂的存在；该取代效应可诱导出稳定的铁磁性。铁掺杂对掺铁CuO的本征磁学特性——矫顽力产生了调控作用，该调控效应并非源于第二杂相的引入。