Magnetic Properties of the Superconducting Ladder System
Abstract
We have observed superconductivity in the single crystals of the ladder system (Ca,Sr,Y)_14(Cu,Bi,Pb,Al)_24O_41. The critical temperature of the transition to the superconducting state was determined to be 80 K. The studied system has both simple chains and two-leg ladder chains of copper ions. The measurements performed on a nonsuperconducting compound of the 14-24-41 system, with the same crystal structure, have shown that the simple chain has an excitation gap to the triplet state due to dimerization of Cu^2+ ions. The increase of susceptibility at low temperature comes from the broken simple chains and ladder chains. It is suggested that the similar behavior, characterized by almost the same excitation gap, is observed also in superconducting compounds of the investigated 14-24-41 system.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 1997
- Bibcode:
- 1997APS..MAR.F1101S