Oxygen Deficient YBa_2Cu_3O_{7-δ}: Two Superconducting Phases

• Authors: J. Stankowski , A. Ślązak , W. Kempiński , B. Andrzejewski , B. Reichel , G. Plesch
• Languages of publication: EN

Abstracts

EN

A set of oxygen deficient powder and granular samples of YBa_2Cu_3O_{7-δ} ceramics was studied by means of thermogravimetric and magnetically modulated microwave absorption methods. Especially the last method has turned out to be a powerful method, which was used to determine the dependence of critical temperature T_c on the oxygen parameterδ. Using these methods it has been shown that the removing of oxygen evokes the inhomogeneous oxygen distribution in the samples and a change in carrier concentration till to the loss of superconducting properties. A superconducting phase with T_c=60 K, which occurs in oxygen deficient YBa_2Cu_3O_{7-δ} sample, is an unstable phase.

Keywords

EN

74.72.-h; 74.62.Bf; 74.62.-c; 74.25.Nf

Discipline

• 74.72.-h: Cuprate superconductors
• 74.62.Bf: Effects of material synthesis, crystal structure, and chemical composition(for methods of materials synthesis, see 81.20.-n)
• 74.62.-c: Transition temperature variations, phase diagrams

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 105
• Issue: 3
• Pages: 287-294

Dates

published

2004-03

received

2003-10-06

accepted

2003-12-19

Contributors

author

J. Stankowski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

A. Ślązak

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

W. Kempiński

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

B. Andrzejewski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

B. Reichel

• Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, Narutowicza 11/12, 80-952 Gdańsk, Poland

author

G. Plesch

• Department of Inorganic Chemistry, Faculty of Natural Sciences Comenius University, 842 15 Bratislava, Slovakia

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Identifiers

DOI

10.12693/APhysPolA.105.287