利用Norton Ghost工具制作映像文件来快速备份、恢复操作系统已成为业内的通行做法,但具体情况还需具体分析,巧妙的方法能取得事半功倍的效果。描述了并行计算机群的安装方法,着重讲述了基于新近出品的Redhat L inux Advanced Server 4....利用Norton Ghost工具制作映像文件来快速备份、恢复操作系统已成为业内的通行做法,但具体情况还需具体分析,巧妙的方法能取得事半功倍的效果。描述了并行计算机群的安装方法,着重讲述了基于新近出品的Redhat L inux Advanced Server 4.0操作系统下如何高效地安装、配置并行计算机群。展开更多
We investigate the vortex dynamics in two typical hole doped iron based superconductors CaKFe_4As_4(CaK1144) and Ba_(0.6)K_(0.4)Fe_2As_2(BaK122) with similar superconducting transition temperatures. It is found that t...We investigate the vortex dynamics in two typical hole doped iron based superconductors CaKFe_4As_4(CaK1144) and Ba_(0.6)K_(0.4)Fe_2As_2(BaK122) with similar superconducting transition temperatures. It is found that the magnetization hysteresis loop exhibits a clear second peak effect in BaK122 in wide temperature region while it is absent in CaK1144. However, a second peak effect of critical current density versus temperature is observed in CaK1144, which is however absent in BaK122. The different behaviors of second peak effect in BaK122 and CaK1144 may suggest distinct origins of vortex pinning in different systems. Magnetization and its relaxation have also been measured by using dynamical and conventional relaxation methods for both systems. Analysis and comparison of the two distinct systems show that the vortex pinning is stronger and the critical current density is higher in BaK122 system. It is found that the Maley's method can be used and thus the activation energy can be determined in BaK122 by using the time dependent magnetization in wide temperature region, but this is not applicable in CaK1144 system.Finally we present the different regimes with distinct vortex dynamics in the field-temperature diagram for the two systems.展开更多
文摘利用Norton Ghost工具制作映像文件来快速备份、恢复操作系统已成为业内的通行做法,但具体情况还需具体分析,巧妙的方法能取得事半功倍的效果。描述了并行计算机群的安装方法,着重讲述了基于新近出品的Redhat L inux Advanced Server 4.0操作系统下如何高效地安装、配置并行计算机群。
基金supported by the National Key Research and Development Program of China(2016YFA0300401)the National Natural Science Foundation of China(A0402/11534005)
文摘We investigate the vortex dynamics in two typical hole doped iron based superconductors CaKFe_4As_4(CaK1144) and Ba_(0.6)K_(0.4)Fe_2As_2(BaK122) with similar superconducting transition temperatures. It is found that the magnetization hysteresis loop exhibits a clear second peak effect in BaK122 in wide temperature region while it is absent in CaK1144. However, a second peak effect of critical current density versus temperature is observed in CaK1144, which is however absent in BaK122. The different behaviors of second peak effect in BaK122 and CaK1144 may suggest distinct origins of vortex pinning in different systems. Magnetization and its relaxation have also been measured by using dynamical and conventional relaxation methods for both systems. Analysis and comparison of the two distinct systems show that the vortex pinning is stronger and the critical current density is higher in BaK122 system. It is found that the Maley's method can be used and thus the activation energy can be determined in BaK122 by using the time dependent magnetization in wide temperature region, but this is not applicable in CaK1144 system.Finally we present the different regimes with distinct vortex dynamics in the field-temperature diagram for the two systems.
