Superconducting MgB2 films via precursor postprocessing approach
| Autor: | H. M. Christen, Eliot D. Specht, Claudia Cantoni, Mariappan Parans Paranthaman, H. R. Kerchner, Tolga Aytug, David K. Christen, D. H. Lowndes, James R. Thompson, Srivatsan Sathyamurthy, Hong-Ying Zhai |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Diffraction
Superconductivity Yield (engineering) Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter - Superconductivity Analytical chemistry FOS: Physical sciences chemistry.chemical_element Evaporation (deposition) Superconductivity (cond-mat.supr-con) Micrometre Metal chemistry visual_art visual_art.visual_art_medium Crystallite Boron |
| Zdroj: | Applied Physics Letters. 78:3669-3671 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.1377323 |
| Popis: | Superconducting MgB(2) films with Tc = 38.6 K were prepared using a precursor-deposition, ex-situ post-processing approach. Precursor films of boron, ~0.5 micrometer thick, were deposited onto Al(2)O(3) (102) substrates by e-beam evaporation; a post-anneal at 890 deg C in the presence of bulk MgB(2) and Mg metal produced highly crystalline MgB(2) films. X-ray diffraction indicated that the films exhibit some degree of c-axis alignment, but are randomly oriented in-plane. Transport current measurements of the superconducting properties show high values of the critical current density and yield an irreversibility line that exceeds that determined by magnetic measurements on bulk polycrystalline materials. PDF file with 10 pages total, including 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|