Electronic and magnetic properties of the high-T c superconductor EuBa2Cu3O x
| Autor: | E. Mörsen, A. Freimuth, S. Blumenröder, W. Schlabitz, G. Buth, H. Kierspel, H. J. Schmidt, E. Zirngiebl, J. Langen, G. Jackel, A. Nowack |
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| Rok vydání: | 1987 |
| Předmět: |
Superconductivity
Materials science High-temperature superconductivity Magnetic moment Condensed matter physics Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials law.invention Paramagnetism Magnetization law Electrical resistivity and conductivity General Materials Science Critical field |
| Zdroj: | Zeitschrift f�r Physik B Condensed Matter. 68:433-436 |
| ISSN: | 1434-6036 0722-3277 |
| DOI: | 10.1007/bf01471073 |
| Popis: | Electrical resistivity and magnetic susceptibility show that single phase EuBa2Cu3Ox becomes superconducting at 94 K. Magnetization and magnetoresistivity yield a lower critical field of Hc1≃500 G and a variation ofTcwith magnetic field of dTc/dH≃1 K/T. The high temperature resistivity shows that at about 700 K due to oxygen loss the sample is driven into a semiconducting state, in which the superconductivity is destroyed. The normal state magnetic susceptibility measured in the superconducting and in the oxygen degased, semiconducting sample indicates that the sample is paramagnetic in the normal state. This paramagnetism is larger than the one expected for trivalent Eu and therefore has to be attributed in part to a magnetic moment on Cu. Eu is found to be stable trivalent between 300 and 4.2 K through Mosbauer-spectroscopy. |
| Databáze: | OpenAIRE |
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