论文标题
监测蒙或米布尔德层间间隧穿壁垒的形成
Monitoring of the formation of strontium molybdate intergrain tunneling barriers in strontium ferromolybdate
论文作者
论文摘要
这项工作有助于理解腹膜腹膜（SFMO）陶瓷中的电阻率。它表明，适当的热处理会导致在SFMO纳米表面形成介电SRMOO4壳。在没有SRMOO4壳的样品中，电阻温度系数的迹象随温度从非常低的温度升高到较高温度下的正变化。表现出负温度系数的样品包含SRMOO4壳，并证明了可以用波动引起的隧道模型来描述的电阻率的行为，并且电导率机制在室温接近室温下转换为可变范围的跳跃。这项工作的结果是理解低场磁场抗性的起点，这对于Spintronic设备应用非常有前途。
This work is a contribution to the understanding of the electrical resistivity in strontium ferromolybdate (SFMO) ceramics. It demonstrates that an appropriate thermal treatment leads to the formation of dielectric SrMoO4 shells at the surface of SFMO nanograins. In samples without SrMoO4 shells, the sign of the temperature coefficient of resistance changes with increasing temperature from negative at very low temperature to positive at higher temperatures. Samples exhibiting a negative temperature coefficient contain SrMoO4 shells and demonstrate a behavior of the resistivity that can be described in terms of the fluctuation-induced tunneling model, and near room temperature the conductivity mechanism converts to a variable-range hopping one. The results of this work serve as a starting point for the understanding of the low-field magnetoresistance which is very promising for spintronic device application.
