LORENTZ MICROSCOPY OF VORTEX LATTICES (FLUX LINES) IN NIOBIUM

被引：29

作者：

BONEVICH, JE ^{[1
]}

HARADA, K ^{[1
]}

KASAI, H ^{[1
]}

MATSUDA, T ^{[1
]}

YOSHIDA, T ^{[1
]}

POZZI, G ^{[1
]}

TONOMURA, A ^{[1
]}

机构：

[1] UNIV BOLOGNA,DEPT PHYS,I-40126 BOLOGNA,ITALY

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.49.6800

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Observations of the flux-line lattice in tilted superconducting specimens by standard methods of Lorentz microscopy can be understood in terms of a simple model which (i) first approximates the individual vortex line by a flux tube of negligible radius, thereby obtaining an analytical expression for the two-dimensional phase shift, and then (ii) takes into account the finite flux core structure by convoluting the former expression with the assumed model for the core. By taking the London model for the magnetic-field distribution of the core, thus having the vortex described by a single parameter, i.e., the London penetration depth, the most relevant contrast features observed in the experimental out-of-focus images of a Nb superconductor are interpreted.

引用

页码：6800 / 6807

页数：8

共 20 条

[1] ELECTRON HOLOGRAPHY OBSERVATION OF VORTEX LATTICES IN A SUPERCONDUCTOR [J].