Investigations of silicon nano-crystal floating gate memories
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
The crystal chemistry of the system LaO1.5-CaO-CuO at the 1:1:2 composition was studied at high pressures with the goal of stabilizing new perovskite cuprates with two-dimensional ordering of La, Ca cations and oxygen vacancies. Several phases, including the perovskites La4Ca4Cu8O20, La4Ca4Cu88O18 and the Ruddlesden-Popper (RP) phase La2Ca2Cu3O8, containing three copper oxide layers (n = 3), were revealed for the first time. The results are very sensitive to experimental conditions, and a variety of reaction channels are observed at the 1:1:2 composition depending on the choice of total pressure, Po2, temperature, and annealing conditions. The perovskite-related phases at this composition exhibited A-site cation disorder and three-dimensional ordering of oxygen vacancies. The Ruddlesden-Popper phase required the substitution of Sr on the A-sites to be metastably retained at room temperature. Due to its thermal instability, the RP phase could not be doped to a carrier concentration at which superconductivity might be observed. © 1994 Academic Press, Inc.
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
J. Tersoff
Applied Surface Science
Andreas C. Cangellaris, Karen M. Coperich, et al.
EMC 2001
Ranulfo Allen, John Baglin, et al.
J. Photopolym. Sci. Tech.