A Simultaneous Magnetization and Magnetoresistance Study of the Roles of Anisotropy and Fluxoid Motion in High Temperature Superconductors

同时测量直流磁化强度M（H，T，O）和 电阻R（H，T，O）将在单晶样品上进行 一系列各向异性增加的超导体， 1）将耗散贡献与真正的 超导性能的测定上 临界场，2）研究准二的作用 关于临界温度的维数（各向异性）， 场和电流。 所研究的系统应为Bi和Tl基氧化物 超导体，和高Tc有机超导体（BEDT- TTF）2Cu（NCS）2是一个密切相关的重要体系， 具有类似的通量流和各向异性特性， 氧化物

Simultaneous measurements of the d.c. magnetization M(H,T,O) and resistance R(H,T,O) will be performed on monocrystalline samples of a series of superconductors of increasing anisotropy, in order to 1) separate the dissipative contributions from the truly superconducting properties in a dtermination of the upper critical field, and 2) investigate the role of quasi-two dimensionality (anisotropy) with regard to critical temperatures, fields and currents. The systems studied shall be the Bi-and Tl-based oxide superconductors, and the high Tc organic superconductor (BEDT- TTF)2Cu(NCS)2, a closely related and important system which possesses similar flux-flow and anisotropic properties as the oxides.