TY - JOUR
T1 - Vacuum annealing treatment effects on structure and superconductivity in RBa2Cu3O7-δ and YBa2-xKxCu3O7-δ
AU - Felner, I.
AU - Barbara, B.
PY - 1988/4
Y1 - 1988/4
N2 - We report the effects of heat treatment in a very low pressure at 800°C on the structure and superconducting properties of RBa2Cu3O7-δ R=Y, Nd and Eu, and YBa2-xKxCu3O7-δ. These systems undergo an orthorhombic (and superconducting) to amorphous (and non superconducting) transition, caused by large oxygen losses (δ = 1.3-1.8) and disordering of oxygen vacancies. Then by a controlled technique we restored the oxygen content to a value of δ = 0 and the orthorhombic crystal structure and superconductivity were fully recovered. The substitution of barium with potassium is reported for the first time. The recovered NdBa2Cu3O7-δ (δ = 0.7) is superconducting with TC = 89 K.
AB - We report the effects of heat treatment in a very low pressure at 800°C on the structure and superconducting properties of RBa2Cu3O7-δ R=Y, Nd and Eu, and YBa2-xKxCu3O7-δ. These systems undergo an orthorhombic (and superconducting) to amorphous (and non superconducting) transition, caused by large oxygen losses (δ = 1.3-1.8) and disordering of oxygen vacancies. Then by a controlled technique we restored the oxygen content to a value of δ = 0 and the orthorhombic crystal structure and superconductivity were fully recovered. The substitution of barium with potassium is reported for the first time. The recovered NdBa2Cu3O7-δ (δ = 0.7) is superconducting with TC = 89 K.
UR - http://www.scopus.com/inward/record.url?scp=0023996916&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(88)90810-1
DO - 10.1016/0038-1098(88)90810-1
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AN - SCOPUS:0023996916
SN - 0038-1098
VL - 66
SP - 205
EP - 210
JO - Solid State Communications
JF - Solid State Communications
IS - 2
ER -