Structural and Magnetic Properties of RBa2Cu2NbO8 (R = La, Pr, Nd)

Autor:	R.N. Shelton, Peter Klavins, C. A. Smith, Harry B. Radousky, M. Bennahmias, T.J. Goodwin, J.M. Link, J.C. O'Brien
Rok vydání:	1992
Předmět:	Superconductivity High-temperature superconductivity Materials science Condensed matter physics Solid-state physics Praseodymium Doping chemistry.chemical_element law.invention Magnetization chemistry law Crystallite Thin film
Zdroj:	MRS Proceedings. 275
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-275-113
Popis:	PrBa2Cu2NbO8 (PrBCNO) is an insulating analog to the YB2CU3O7 (YBCO) system, which is interesting as a thin film buffer layer in YBCO/PrBCNO/YBCO tunnel junctions as well as a potential high Tc superconductor if proper doping could be achieved. PrBCNO has a similar structure to PrBCO, with NbO2 planes replacing the CuO chains. Single phase polycrystalline samples of RBCNO have been synthesized with R = La, Pr and Nd. Attempts to synthesize this structure with the smaller ions Y and Gd have been unsuccessful. The PrBCNO samples show a signature in the magnetization of a magnetic ordering at 12 K. No such magnetic phase transition is observed down to 2 K in the NdBCNO material.
Databáze:	OpenAIRE
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