FLUX-QUANTIZATION IN MAGNETIC NANOWIRES IMAGED BY ELECTRON HOLOGRAPHY

被引：26

作者：

BEELI, C ^{[1
]}

DOUDIN, B ^{[1
]}

STADELMANN, P ^{[1
]}

机构：

[1] ECOLE POLYTECH FED LAUSANNE,INST PHYS EXPTL,CH-1015 LAUSANNE,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.75.4630

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Off-axis electron holography has been employed to visualize and measure the magnetic flux leaking from cobalt wires having a radius of 40 nm and a length of a few mu m. The magnetic flux of a single nanowire can be understood as the flux of a superposition of magnetic dipoles oriented along the nanowire axis at locations revealed by the phase as well as the amplitude image reconstructed from the hologram. Surprisingly, the reconstructed phase image showed that the total flux of the individual dipoles was always h/e, defined as a flux quantum Phi(0) and corresponding to a phase change of 2 pi.We were able to image single nanowires with a flux of 1 Phi, 2 Phi, and 3 Phi(0), measured with a precision of Phi(0)/32.

引用

页码：4630 / 4633

页数：4

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