Transport characteristics of Bi2Sr2Ca2Cu3O10+δ (Bi-2223) single crystal whisker

We are reporting the electric transport properties of Bi2Sr2Ca2Cu3O10+delta (Bi-2223) single-crystal whiskers in ab-plane and c-axis. We fabricated a stack with in-plane area of 2 mu m x 2 mu m and height of approximately 300 nm using focused ion beam (FIB) etching method, which has two hundred of elementary junctions in c-axis. Sharp and single phase transition in ab-plane (T-c approximate to 108 K) shows high crystallinity of single crystal whiskers. We also measured current (I) - voltage (V) characteristics in c-axis at 30 K and estimated critical current density of 1x10(3) A/cm(2). A well defined voltage gap (Vg approximate to 2 V) also exists in I-V characteristics, which corresponds to number of elementary Josephson junctions.