Growth and Superconductivity of (BiPb)2Sr2Ca2Cu3O10+δ Single-Crystal Whiskers
Growth and Superconductivity of (BiPb)2Sr2Ca2Cu3O10+δ Single-Crystal Whiskers
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(BiPb)2Sr2Ca2Cu3O10+δ单晶晶须的生长和超导性
DOI：
10.1143/jjap.41.l43
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发表时间：
2002
影响因子：
1.5
通讯作者：
T. Yamashita
中科院分区：
文献类型：
--
作者：
M. Nagao;Mitsunori Sato;H. Maeda;Sang‐Jae Kim;T. Yamashita
通过对掺Te的（BiPb）2Sr 2Ca 2Cu 3 O_（10）+δ（（BiPb）2223）前驱体烧结体进行退火处理，生长出长约2 mm的（BiPb）2Sr 2Ca 2Cu 3 O_（10）+δ（（BiPb）2223）单晶晶须。通过将单相（BiPb）2223与TeO 2混合而形成颗粒; TeO 2与Bi 2223的含量比为0.5。对于生长，使用（BiPb）2223单相粉末作为前驱体是非常重要的。晶须不含Te，其组成为富Ca的（BiPb）2（Sr 0.3Ca 0.7）4Cu 3 Ox。晶须具有良好的结晶性，临界温度约为106 K.由于沿c轴沿着的本征约瑟夫森结，在电流-电压特性中表现出多分支结构的临界电流是相当均匀的，表明晶须是均匀的且质量良好。
(BiPb)2Sr2Ca2Cu3O10+δ ((BiPb)2223) single-crystal whiskers with a length of about 2 mm were grown by annealing a sintered Te-doped (BiPb)2Sr2Ca2Cu3Ox precursor pellet. The pellet was formed by mixing single-phase (BiPb)2223 with TeO2; the content ratio of TeO2 to Bi2223 was 0.5. For the growth, it is very important to use (BiPb)2223 single-phase powder as a precursor. The whiskers contain no Te and their composition is Ca-rich (BiPb)2(Sr0.3Ca0.7)4Cu3Ox. The whiskers have excellent crystallinity and a critical temperature of about 106 K. The critical current, which exhibits a multibranched structure in the current–voltage characteristics due to the intrinsic Josephson junctions along the c-axis, is quite uniform, showing that the whiskers are homogeneous and of good quality.