T. Yamao et al., Ordering characteristics of Josephson-coupled network in YBCO ceramics of fine grains at zero external field, PHYSICA B, 284, 2000, pp. 604-605
YBa2Cu3O7-delta ceramics of small-size grains have been synthesized, and th
eir intergrain orderings are studied by DC magnetizations and by AC magneti
c and electric responses at zero DC field. Characteristic temperature depen
dences of linear resistivity, nonlinear resistivity and nonlinear susceptib
ility are found near the intergrain ordering point T-C2, and the overall fe
ature qualitatively agrees with that of YBa2Cu4O8 ceramics studied previous
ly. (C) 2000 Elsevier Science B.V. All rights reserved.