【摘要】 对高度取向的Cu-Nb原位法复合导体,本文给出了磁场方向、输运电流与细丝方向相对取向不同情况的超导临界电流的变化。对Cu层厚度为5到500nm的样品,当电流平行于细丝的长轴方向时、其临界电流约为电流垂直于细丝长轴方向时的40倍。当磁通线阵运动垂直于细丝方向时,其数据表明剪切模量C₆₆主要起针扎作用。而当磁通线阵平行于丝的长轴方向运动时,其临界电流随磁场下降很快。更多还原

【Abstract】 Highly oriented Cu-Nb in situ composires have been studied to determine the chan-ges in superconducting critical current which occur as the relative orientation of the magnetic field, transport current and filament direction are changed. Samples having Cu barrier thickness in the range from 5 to 500 nm show Jc values about a factor of 40 higher for the current parallel to the long axis of the filaments than for the current perpendicular to the long axis. Where the flux line lattice moves perpendicular to the filament direction, the data show that the shear modulus, C66, governs the flux pin. ning. Where the flux line lattice moves parallel to the long axis of the filaments the fall in critical current with field is much more rapid.更多还原