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Effect of Oxygen Content and Oxygen Vacancy Ordering on the Properties of TbBaCo 2 O 6—δ Perovskites
Author(s) -
Kasper N. V.,
Troyanchuk I. O.,
Khalyavin D. D.,
Hamad N.,
Haupt L.,
Fröbel P.,
Bärner K.,
Gmelin E.,
Huang Q.,
Lynn J. W.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199909)215:1<697::aid-pssb697>3.0.co;2-h
Subject(s) - ferrimagnetism , materials science , magnetization , oxygen , electrical resistivity and conductivity , vacancy defect , condensed matter physics , neutron diffraction , solid oxygen , phase transition , atmospheric temperature range , analytical chemistry (journal) , chemistry , crystallography , crystal structure , thermodynamics , magnetic field , physics , organic chemistry , chromatography , quantum mechanics
Using IR‐spectroscopy, heat capacity experiments, neutron and X‐ray diffraction, as well as magnetization and resistivity measurements, TbBaCo 2 O 6—δ samples with different oxygen content and different thermal history are studied. It is shown that the structural, magnetic and electrical properties are strongly sensitive to oxygen content and oxygen vacancy ordering. We submit that the first order semiconductor‐to‐metal phase transition at 340 to 345 K in this compound is accompanied by oxygen vacancy ordering and short‐range magnetic ordering, and only at 285 K spontaneous long‐range ferrimagnetic ordering occurs.