Effect of Re substitution on the defect structure, and superconducting properties of (Hg{sub 1-x}Re{sub x}Ba{sub 2}Ca{sub n-1}Cu{sub n} O{sub 2n+2+delta} (n=2,3,4).
We have investigated the structure, and superconducting properties of a series of Re substituted HgBa{sub 2}Ca{sub n-1}Cu{sub n}O{sub 2n+2+{delta}} (n = 2, 3, 4) samples by neutron powder diffraction, AC susceptibility, and magnetization measurements. Re atoms substitute at the Hg site and alter the defect structure of the host layer by pulling in four new oxygen atoms at (x x 0) to form an octahedron around Re. Re substitution makes it easier to synthesize the different members of the series; in particular (Hg,Re)-1234 which forms readily with Re concentrations x {ge} 0.2. {Tc} values of the as-prepared samples are 108, 132, and 122 K for the n = 2, 3 and 4 members, respectively. Magnetization measurements show a small enhancement of H{sub irr} with increasing Re-content at low temperatures. No significant enhancement at higher temperatures (T> 70 K) is observed.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- ER
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938090
- Report Number(s):
- ANL/MSD/JA-26884
- Journal Information:
- Physica C, Journal Name: Physica C Journal Issue: 2-4 ; Dec. 20, 1997 Vol. 292; ISSN 0921-4534; ISSN PHYCE6
- Country of Publication:
- United States
- Language:
- ENGLISH
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