晶格常数与掺杂MgB_2体系超导电性及硬度均衡值η_(cp)的关系  

THE RELATIONSHIP OF LATTICE PARAMETER AND SUPERCONDUCTIVITY AND EQUALIZED HARDNESS OF THE DOPING MgB_2

作　　者：王顺清[1] 孙爱民[1] 朱海滨[1] 张涛[1] 黄国海[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070

出　　处：《低温物理学报》2007年第4期301-306,共6页Low Temperature Physical Letters

摘　　要：依据现有的MgB2掺杂实验,通过对掺杂MgB2体系超导电性与其晶格常数的研究,发现具有较好的规律性.因此本文提出用晶格常数作为掺杂MgB2超导电性的一个判断标准.为了得到晶格常数随掺杂元素及掺杂比例的变化规律,我们又研究了晶胞体积与掺杂MgB2体系硬度均衡值ηcp的关系,发现也具有较好的规律性.这些结果对掺杂二硼化镁超导电性的研究工作及今后实验工作者掺杂元素和掺杂比例的选取都有很好的指导意义.According to the existing experiments of the doping MgB2, by studying the superconductivity of the doping MgB2 and its lattice parameter, a good regularity is found. It is suggested that the Lattice Parameter can be used as a criterion for the experiment of doping MgB2. Then in order to get Law of Changes of Lattice Parameter with doping elements and doping proportion, we study the relationship of crystal volume and equalized hardness ηcp of the doping MgB2 again, a good regularity is found, too. Such achievements have resulted in a good significance for guiding both the research on superconductivity of doping MgB2 and the researchers in their selection of doping elements and doping ratio.

关 键 词：晶格常数 MGB2超导体 超导电性 硬度均衡值 

分 类 号：O511[理学—低温物理]