Positron Lifetime Study on the As-Prepared Cd-Doped Pb-1212 Superconductive Oxides
Abstract
The positron lifetime as a function of the Cd content x was measured for the as-prepared samples of (Pb1 - xCdx)Sr2(Y0.5Ca0.5)Cu2Oy. A constant long-lived lifetime was observed for all samples. The intensity of the long-lived lifetimes has an obvious decrease starting at x = 0.3 and indicated the existence of an impurity phase in the sample with x = 0.3. The monotonous decrease of the bulk lifetime for the single-phase samples implies that Cd mainly substitutes for Pb. The changes of the microstructure with Cd content were discussed.
- Publication:
-
Physica Status Solidi B Basic Research
- Pub Date:
- December 1997
- DOI:
- 10.1002/1521-3951(199712)204:2<757::AID-PSSB757>3.0.CO;2-1
- Bibcode:
- 1997PSSBR.204..757Z