SUPERCONDUCTING FLUCTUATION EFFECTS IN GRAIN-ALIGNED HGBA2CA2CU3O8+DELTA

被引:10
作者
BAE, MK
CHOI, MS
LEE, S
LEE, SI
LEE, WC
机构
[1] RES INST SCI & TECHNOL,DIV PHYS,POHANG 790600,SOUTH KOREA
[2] SOOK MYOUNG WOMENS UNIV,DEPT PHYS,SEOUL 140742,SOUTH KOREA
[3] MOSCOW MV LOMONOSOV STATE UNIV,DEPT CHEM,MOSCOW 119899,RUSSIA
来源
PHYSICA C | 1994年 / 231卷 / 3-4期
关键词
D O I
10.1016/0921-4534(94)90629-7
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have measured the normal state magnetization for grain-aligned HgBa2Ca2Cu3O8+delta with high and low magnetic fields applied perpendicular to the CuO2 planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above T(c) using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.
引用
收藏
页码:249 / 251
页数:3
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