Thermoelectric power and resistivity of bulk HgBa2CuO4+y superconductors and the effects of annealing

C. K. Subramaniam; M. Paranthaman; A. B. Kaiser

doi:10.1016/0921-4534(94)90113-9

Thermoelectric power and resistivity of bulk HgBa₂CuO_4+y superconductors and the effects of annealing

C. K. Subramaniam, M. Paranthaman, A. B. Kaiser

Nanomaterials Chemistry Group

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

We have measured the thermopower and resistivity of bulk superconducting samples of HgBa₂CuO_4+y (Hg-1201). Various annealing treatments under flowing oxygen and argon were carried out in order to change the oxygen content and thereby the charge-carrier density. As the oxygen content is increased, both the thermopower and resistivity decrease, and the thermopower becomes negative with a negative linear slope. The overall pattern of the thermopower and T_c variation is similar to that found recently for the Tl-1201 superconductor series.

Original language	English
Pages (from-to)	47-51
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	222
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90113-9
State	Published - Mar 10 1994

Funding

This work (CKS and ABK) was funded by the Foundation for Research, Science and Technology of New Zealand. The work of MP was sponsored by the Division of Materials Sciences, Office of Basic Energy Sciences, US Department of Energy and Technology Superconductor Technology program, both under contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc. The work of MP was also supported by the Oak Ridge National Laboratory Postdoctoral Program, administered jointly by the Oak Ridge Institute for Science and Education and ORNL. CKS thanks Jonathan Hewison for his technical assistance with the experimental setup. MP thanks J. Brynestad for encouragement and helpful discussions.

Funders	Funder number
Foundation for Research, Science and Technology of New Zealand
Office of Basic Energy Sciences
US Department of Energy and Technology Superconductor Technology program	DE-AC05-84OR21400
Oak Ridge National Laboratory
Oak Ridge Institute for Science and Education
Division of Materials Sciences and Engineering

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Thermoelectric power and resistivity of bulk HgBa₂CuO_4+y superconductors and the effects of annealing

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