Observation of Microwave Magnetoabsorption in the High-TcPhase of a Bi(Pb)-Sr-Ca-Cu-O Superconductor
- 1 October 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (10A) , L1750-1753
- https://doi.org/10.1143/jjap.28.l1750
Abstract
Microwave responses at 22.9 GHz of a high-TcBi(Pb)-Sr-Ca-Cu-O superconductor have been studied under magnetic fields up to 12 kG and temperatures of 4–130 K. The microwave magnetoabsorption curve systematically depends on the “magnetic history” after zero-field cooling. We show that the sharp change of microwave absorption in the low field range is not attributed to zero field ESR, but is probably caused by many Josephson junctions in the ceramic sample. By reducing contribution from Josephson junctions, the lower critical fieldHc1bcan be estimated from the magnetoabsorption curve.Keywords
This publication has 27 references indexed in Scilit:
- ESR and Nonresonant Microwave Absorption in a High-TcSuperconductor of the Tl-Ba-Ca-Cu-O SystemJapanese Journal of Applied Physics, 1989
- Characteristics of Holes Investigated by ESR in High-Tcphase of Bi(Pb)-Sr-Ca-Cu-O SystemJapanese Journal of Applied Physics, 1989
- Absorption of microwaves in superconducting YBa_2Cu_3O_7 and field-cooling effectsJournal of the Optical Society of America B, 1989
- Low-field ac susceptibility and microwave absorption in YBaCuO and BiCaSrCuO superconductorsPhysica C: Superconductivity and its Applications, 1988
- Superconducting and normal state parameters of Bi2.2Sr2Ca0.8Cu2O8+δ single crystals: A comparison with Ba2YCu3O7Physica C: Superconductivity and its Applications, 1988
- Microwave absorption studies in new high-Tcsuperconducting oxide systems: Tl-Ba-Ca-Cu-O and Bi-Ca-Sr-Cu-OJournal of Physics C: Solid State Physics, 1988
- Superconductivity and microwave absorptionNature, 1988
- Size of Josephson junctions in Ba-Y-Cu-O compoundsPhysical Review B, 1988
- Possible role of Cu2+–Cu4+ pairs in the superconductivity of YBa2Cu3O7–x from electron spin resonance observationsNature, 1987
- Anomalous Temperature Dependence of Hc1 in High-Tc Superconductor YBa2Cu3O7-δJapanese Journal of Applied Physics, 1987