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Secondary ion mass spectrometry characterization of NdBa 2 Cu 3 O 7− x and EuBa 2 Cu 3 O 7− x single crystals
Author(s) -
Fabrizio M.,
Pagura C.,
Tolstogouzov A.,
Daolio S.,
Ferretti M.,
Mag E.,
Olcese G. L.
Publication year - 1998
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19980615)12:11<675::aid-rcm216>3.0.co;2-o
Subject(s) - chemistry , secondary ion mass spectrometry , analytical chemistry (journal) , ionic bonding , ion , single crystal , mass spectrometry , metal , impurity , crystallography , organic chemistry , chromatography
The surface features of NdBa 2 Cu 3 O 7−δ and EuBa 2 Cu 3 O 7−δ single crystals grown from a BaO/CuO flux at high temperatures were investigated by Secondary Ion Mass Spectrometry (SIMS). The crystals obtained have been structurally characterized by X‐ray diffraction; the oxygen content has been determined both by structural examination and by iodometric titration, and the electrical resistivity has been measured by the four‐thread technique. SIMS has been used to examine the growth features on the (001) faces of the crystals.Impurity inclusions, ionic species from metals with different oxidation state, homo‐ and hetero‐metal clusters, their ionic yields and distribution in different matrices could usefully be compared to information obtained with traditional methodologies utilized in this field.Results obtained by SIMS for both NdBa 2 Cu 3 O 7−δ and EuBa 2 Cu 3 O 7−δ single crystals could provide new instruments in estimating the property of superconducting materials. For example, the reaction of Al–Cu substitution was observed on the crystal surface, as indicated by mixed cluster signals on the positive and negative ion spectra confirming the already observed interaction between material from crucible and REBa 2 Cu 3 O 7−δ (RE = Rare Earths, except for Ce, Pr and Tb). © 1998 John Wiley & Sons, Ltd.