论文部分内容阅读
介绍了重电子金属CeCu6 -xCdx(x=0 10 ,0 15 ,0 2 0 ,0 30 ,0 5 0 )在 1 8— 30 0K温度范围内 ,在磁场 (μ0 H =0 ,5 ,10T)下电阻随温度的变化规律及低温 (1 9,15K)下的磁电阻 (μ0 H =0— 10T) .实验表明所有样品在零场下的Tmax(对应于电阻极大值的温度 )都低于 1 8K .加磁场后 ,Tmax随磁场和掺杂量x的增加明显向高温方向变化 .此外 ,各样品的磁电阻在 1 9K全是负值 ,温度升高到 15K以后 ,磁电阻有变为正值的趋势 .从近藤散射和相干散射的角度对这一现象的物理机制进行了分析 .
In the magnetic field (μ0 H = 0, 5, 10T) is introduced in the temperature range of 1 8- 30 0K for heavy electronic metals CeCu6-xCdx (x = 0 10, 0 15, 0 2 0, 0 30, 0 5 0) The lower resistance changes with the temperature and the magnetoresistance at low temperature (1 9,15K) (μ0 H = 0-10T) .Experiments show that all samples have low Tmax (corresponding to the temperature of the resistance maximum) at zero field After adding the magnetic field, Tmax obviously changes to high temperature with the increase of magnetic field and doping amount X. In addition, the magnetoresistance of each sample is negative at 1 9K. After the temperature rises to 15K, the magnetoresistance changes Is a positive trend.The physical mechanism of this phenomenon is analyzed from the perspective of near-vine scattering and coherent scattering.