Superconducting and Magnetic Properties in Metamorphic Phases of GdBa2Cu3O7-δ

Autor:	Akira Shimono, Akio Oota, Yoshinobu Sasaki, Yoshio Kiyoshima
Rok vydání:	1988
Předmět:	Superconductivity High-temperature superconductivity Magnetic moment Condensed matter physics Chemistry General Engineering General Physics and Astronomy Magnetic susceptibility law.invention Magnetization law Critical point (thermodynamics) Electrical resistivity and conductivity Meissner effect
Zdroj:	Japanese Journal of Applied Physics. 27:L227
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.27.l227
Popis:	Superconducting and magnetic properties were studied on samples of GdBa2Cu3O7-δ in the ortho-I, ortho-II and tetra-II phases, where ortho-I is typical of the 90 K-superconductor. The ortho-I sample shows a value of T c=92.7±0.3 K and the Meissner flux expulsion near 100% at T=79.0 K. Ortho-II has a value of T c=49.0±5.0 K, while tetra-II shows no superconductivity until 4.2 K. The susceptibility data for ortho-I between 100 and 700 K provides the effective magnetic moment 7.38µB, which is slightly smaller than 7.94µB for a free trivalent ion of Gd.
Databáze:	OpenAIRE
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