熔融织构Y_(0.8)Ca_(0.2)Ba_2Cu_3O_y的电子比热  

ELECTRONIC SPECIFIC HEAT IN MELTED-TEXTURED-GROWTH Y_(0.8)Ca_(0.2)Ba_2Cu_3O_y CRYSTAL

作　　者：白忠[1] 王智河[1] 李配军[1] 聂阳[1] 邱里[1] 丁世英[1] 张宏[2] 

机构地区：[1]南京大学固体微结构国家重点实验室,南京210093 [2]中科院上海微系统与信息技术研究所,上海200050

出　　处：《低温物理学报》2005年第A01期580-585,共6页Low Temperature Physical Letters

基　　金：国家自然科学基金(项目编号:10174033);国家超导973项目;南京大学测试基金;预研基金资助的课题

摘　　要：采用热驰豫方法在0到9T范围内测量了熔融织构Y0．8Ca0．2Ba2Cu3Oy的比热．零场下，2-180K的比热结果可以用Einstein模型来描述．通过4-Einstein峰拟合声子谱的方法，我们分别处理了不同磁场下超导转变附近的比热，获得了晶格比热和不同磁场下的电子比热，并将实验结果与London模型的计算结果进行对比，发现London模型能够很好地模拟出我们的实验结果．The specific heat of melted-textured-growth Y0.8Ca0.2Ba2Cu3Oy was measured by using thermal relaxation technique. The lattice specific heat between 2 to 180K in 0T can be described appropriately by Einstein model. Using 4 Einstein peaks method, we deal with the abnormal specific heat separated the electronic and lattice specific heat in different fields near the superconducting transition. By comparing electronic specific heat peaks in different fields with London model, we find that our results can be simulated correctly by the London model.

关 键 词：高温超导体 比热 

分 类 号：O511.2[理学—低温物理]