Dynamics of cation ordering in an intentionally prepared low-T-c pseudocubic NdBa2Cu3O6.9 phaseстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The modification of a NdBa2Cu3O6.9 superconductor representing its disordered state with a low T-c similar to 50 K and a pseudocubic a similar to b similar to c/3 similar to 3.9 A unit cell was prepared reproducibly from freeze-dried nitrate precursors. Isothermal annealing of the pseudocubic phase for 60-70 h at similar to1000 degreesC in air converted it gradually into the conventional modification with a T-c similar to 90 K and a regular orthorhombic lattice after oxygenation.