U.S.-Germany Cooperative Research to Increase Flux Pinning in Bismuth-Based High Temperature Superconductors

该奖项支持Eric Hellstrom教授和威斯康星州大学的一位初级同事兼研究生与斯图加特大学非金属无机材料研究所的P Majewski博士及其团队在材料研究方面进行合作。 他们的研究目标是增加铋基高温超导体中的磁通钉扎。 他们的方法将是通过操纵铋基超导体的化学性质和改变热处理过程，在银护套的铋基带材中产生磁通钉扎中心。 该合作汇集了美国小组在制造，加工和表征长长度银护套高温超导体所涉及的科学问题方面的专业知识，以及斯图加特大学生成的铋基系统中相位关系的详细知识。 增加磁通钉扎将提高这些超导体在开氏30度时所能承载的电流密度，从而大大扩展它们的应用范围。 美国和德国集团的互补专业知识创造了一个独特的合格合作，以追求这一宝贵的目标。

This award supports Professor Eric Hellstrom and a junior colleague and graduate student of the University of Wisconsin to collaborate in materials research with Dr. P Majewski and his group at the Institute for Non-Metallic Inorganic Materials of the University of Stuttgart. The objective of their research is to increase the flux pinning in bismuth-based high temperature superconductors. Their approach will be to create flux pinning centers in silver sheathed bismuth-based tape by manipulating the chemistry of the bismuth-based superconductor and varying the thermal processing. The collaboration brings together the expertise of the U.S. group in the scientific issues involved in fabricating, processing and characterizing long lengths of silver-sheathed high temperature superconductors, with the detailed knowledge of phase relations in the bismuth-based system generated at the University of Stuttgart. Increased flux pinning will raise the current density that these superconductors can carry at thirty degrees Kelvin to a level that will greatly expand the applications in which they can be used. The complementary expertise of the U.S. and German groups creates a uniquely qualified collaboration to pursue this valuable objective.