| Autor: |
Kobayashi, Tadashi, Katsuda, Hiratoshi, Sakabe, Yukio, Iwai, Kiyoshi, Kanba, Seiji |
| Zdroj: |
Phase Transitions: A Multinational Journal; July 1988, Vol. 12 Issue: 3 p215-223, 9p |
| Abstrakt: |
EPR spectra of superconducting YBa2Cu3O7-δ and insulating Y2BaCuO5 have been examined. The intensity of Cu2+ ions in YBa2Cu3O7-δ is about 1/3000 of that in Y2BaCuO5 at room temperature. Owing to the Meissner effect in the superconducting state, the EPR signal of Cu2+ ions in YBa2Cu3O7-δ disappears; moreover the EPR signal of DPPH deposited on the YBa2Cu3O7-δ specimen is shifted. An additional EPR line is found for YBa2(Cu2.94Cr0.06)O7-δ at temperatures below 113K; this can be related to the phenomenon of superconductivity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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