Synthesis of thin films of the new oxide superconductors that have large critical current densities has been an important development in taming the properties of those materials for useful applications. A superconductor becomes normal when a current stronger than the critical current density is passed through it. Many applications, however, require large values of the critical current density. “Good” films of the 90‐K superconductor with critical current densities as large as at 77 K have been reported, according to Praveen Chaudhari (IBM Yorktown Heights). These values of the critical current density, as well as the magnetic properties of the epitaxial films, compare quite favorably with those of the commercially used niobium‐titanium superconductor at 4.2 K.
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March 1989
March 01 1989
High‐Temperature Supercurrents May Not Be Forever
Anil Khurana
Physics Today 42 (3), 17–21 (1989);
Citation
Anil Khurana; High‐Temperature Supercurrents May Not Be Forever. Physics Today 1 March 1989; 42 (3): 17–21. https://doi.org/10.1063/1.2810920
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