A comparative Mossbauer study of the Nd1+xBa2-x(Cu-0.97 Fe-57(0.03))(3)O-z solid solution: the role of low-temperature treatmentстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Local structure features of the Nd1+x Ba2-x ((Cu0.97Fe0.03)-Fe-57)(3)O-z solid solution with various oxygen contents and cation compositions were examined for the first time by Mossbauer spectroscopy to explore the effects of cation disorder in the cases of the anomalous pseudocubic x = 0 phase, the x = 0.6 tetragonal solid solution with Nd stochastically substituting Ba and also the x = 0.9 orthorhombic phase with superstructurally ordered Nd and Ba. A new spectral component characterized by an isomer shift delta similar to 0 mm s(-1) and quadrupole splitting Delta similar to 0.5 mm s(-1) was found for all the cases, evidencing the formation of associated defects such as 'Fe(IV)(cu1)O-6-Nd-Ba' and confirminc, antistructural disordering of Nd3+ and Ba2+ in low-T-c NdBa2Cu3Oz samples.