ELECTRON HOLOGRAPHY OBSERVATION OF VORTEX LATTICES IN A SUPERCONDUCTOR

被引：106

作者：

BONEVICH, JE ^{[1
]}

HARADA, K ^{[1
]}

MATSUDA, T ^{[1
]}

KASAI, H ^{[1
]}

YOSHIDA, T ^{[1
]}

POZZI, G ^{[1
]}

TONOMURA, A ^{[1
]}

机构：

[1] UNIV LECCE,DEPT MAT SCI,I-73100 LECCE,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.70.2952

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic lines of force penetrating a superconducting Nb thin film have been directly observed by electron holography. The tilted specimen is examined in the ''transmission'' mode that allows the 2D magnetic flux distribution to be discerned in an interference micrograph. The phase distribution of the electron wave transmitted through the specimen has been quantitatively measured. It was found that a 2D array of tiny regions, where the phase distribution rapidly changed, coincided spatially with the spots observed by Lorentz microscopy, and, furthermore, these regions were identified to be quantized vortices each having a flux of h/2e by comparing with theoretical calculations.

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页码：2952 / 2955

页数：4

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