超导体中各向异性的研究  

Study on Anisotropy in Supeconductors

作　　者：黄新民[1] 陈羽[2] 

机构地区：[1]汉中师范学院物理系 [2]汉中师范学院化学系

出　　处：《山西师大学报（自然科学版）》1997年第4期41-45,共5页Journal of Shanxi Teachers University(Natural Science Edition)

摘　　要：高温超导体的各向异性体现在各个方面。晶体学上，由于具有层状结构、夹层结构、熔织结构等，呈现出各向异性。以不同方向间的有效质量比表征的各向异性因子ｒ（＝ｍｅ／ｍａ），在不同体系间有数量级上的不同（Ｙ系≈２０；Ｂｉ系≈３×１０＾３；Ｔｉ系≈１０＾４）。因此，即使在相同温度和磁场下，有的材料可以看成为各向异性的三维体系，有的已减缩为准二维体系。尤其在宏观正常态时的磁、电性质各异。Anisotropy of high - temperature superconductors is reflected in many fields. On crystallography, due to stratiform structure, interlayer structure and melt texture structure it reflects anisotropy. Anisotropy factor Γ(me/ma), characterized by effectice mass ratio between different directions, is quite different on quantitative level, among different systems (Y-series≈20. Bi-series≈3×103, Ti-series≈104). Thus, even if under the same condition of temperature and magnetic field, some material can be regarded as, three dimensional system of anisotropy, some has even been reduced to quasi two dimensional system. Especially, magnetic and electric quality are different under macroscopic formal state. In this essay, two-body structure physical model is applied for the study on anisotropy of superconductor. We would like to point out that the distribution of ω, 1-ω are different and different pinning is the major cause to the anisotropy of high temperature superconductor.

关 键 词：超导体 各向异性 双体结构 钉扎 高TC 

分 类 号：O511[理学—低温物理] TM262[理学—物理]