Crystalline instability of Bi-2212 superconducting whiskers near room temperature

被引：6

作者：

Cagliero, Stefano ^{[1
,2
,3
]}

Agostino, Angelo ^{[1
,2
]}

Khan, Mohammad Mizanur Rahman ^{[1
,2
,3
]}

Truccato, Marco ^{[2
,3
]}

Orsini, Francesco ^{[4
,5
]}

Marinone, Massimo ^{[4
,5
]}

Poletti, Giulio ^{[4
,5
]}

Lascialfari, Alessandro ^{[4
,5
,6
]}

机构：

[1] Univ Turin, Dip Chim Gen & Chim Organ, NIS Ctr Excellence, I-10125 Turin, Italy

[2] Univ Turin, CNISM UdR, I-10125 Turin, Italy

[3] Univ Turin, Dip Fis Sperimentale, NIS Ctr Excellence, I-10125 Turin, Italy

[4] Univ Milan, Ist Fisiol Gen & Chim Biol, I-20134 Milan, Italy

[5] NRC, INFM 33, CNR, I-41100 Modena, Italy

[6] Univ Pavia, Dipartimento Fis A Volta, CNR, INFM, I-27100 Pavia, Italy

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2009年 / 95卷 / 02期

关键词：

BI2SR2CACU2O8+DELTA STACKED JUNCTIONS; INTRINSIC JOSEPHSON-JUNCTIONS; OXYGEN-CONTENT; GROWTH; DEFECTS;

D O I：

10.1007/s00339-008-4919-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report new evidences for the thermodynamic instability of whisker crystals in the Bi-Sr-Ca-Cu-O (BSCCO) system. Annealing treatments at 90A degrees C have been performed on two sets of samples, which were monitored by means of X-Rays Diffraction (XRD) and Atomic Force Microscopy (AFM) measurements, respectively. Two main crystalline domains of Bi(2)Sr(2)CuCa(2)O(8+x) (Bi-2212) were identified in the samples by the XRD data, which underwent an evident crystalline segregation after about 60 hours. Very fast dynamics of the surface modifications was also described by the AFM monitoring. Two typologies of surface structures formed after about 3 annealing hours: continuous arrays of dome shaped bodies were observed along the edges of the whiskers, while in the central regions a dense texture of flat bodies was found. These modifications are described in terms of the formation of simple oxide clusters involving a degradation of the internal layers.

引用

页码：479 / 484

页数：6

共 20 条

[1] MICROSCOPIC ASPECTS OF THE FE/BI2SR2CACU2O8 REACTIVE INTERFACE [J].