Chemistry and Superconductivity in Thallium-Based Cuprates
Abstract
Following the discoveries of high temperature superconductivity in the rare-earth copper oxide systems at 40K bY Bednorz and Muller in 1986 and at 90K by other researchers in 1987, Sheng and Hermann, in 1988, discovered superconductivity in the thallium-alkaline-earth copper oxide systems with critical temperatures as high as 120K. All of the T1-based compounds can be described by the general formula, T1mA2Can-1CuO2n+m+2, where m=1 or 2; n=5; A=Ba, Sr. For convenience, the names of these compounds are abbreviated as 2223 for T1Ba2Ca2Cu3O10, where each number denotes the number of T1, Ba(Sr), Ca and Cu ions per formula, respectively. The compounds with m=1 and m=2 are usually referred to as single and double T1-O layered compounds, respectively. The highest superconducting transition temperature known so far was found in T12BaCa2Cu3O10 at 125K.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1990
- Accession Number
- ADA225051
Entities
People
- K. V. Ramanujachary
- L. E. Mcmills
- M. Greenblatt
- Shengxi Li
Organizations
- Rutgers University Department of Chemistry and Chemical Biology