TY - JOUR
T1 - Oxygen deficiency in Ba2YCu3O7-δ
T2 - The need for a microscopic description
AU - Batlogg, B.
AU - Cava, R. J.
PY - 1987/12
Y1 - 1987/12
N2 - The physical properties, such as crystal structure, resistivity, Tc and normal state susceptibility have been studied in Ba2YCu3O7-δ as a function of oxygen deficiency δ. Oxygen was removed in a controlled way at relatively low temperatures employing a Zr-gettering technique. Not only do we find a second superconducting phase with Tc∼60 K and with new (short-range) crystallographic periodicity along the b-direction, but we also find that all physical properties depend on the manner in which oxygen is removed. Variations of physical properties among samples with the same over-all oxygen content can be consistently associated with the occupation of the various O-sites in the structure.
AB - The physical properties, such as crystal structure, resistivity, Tc and normal state susceptibility have been studied in Ba2YCu3O7-δ as a function of oxygen deficiency δ. Oxygen was removed in a controlled way at relatively low temperatures employing a Zr-gettering technique. Not only do we find a second superconducting phase with Tc∼60 K and with new (short-range) crystallographic periodicity along the b-direction, but we also find that all physical properties depend on the manner in which oxygen is removed. Variations of physical properties among samples with the same over-all oxygen content can be consistently associated with the occupation of the various O-sites in the structure.
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U2 - 10.1016/0378-4363(87)90185-9
DO - 10.1016/0378-4363(87)90185-9
M3 - Article
AN - SCOPUS:0023561452
VL - 148
SP - 173
EP - 176
JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
SN - 0378-4363
IS - 1-3
ER -