Quantum transport in ferromagnetic permalloy nanostructures

被引：14

作者：

Neumaier, D. ^{[1
]}

Vogl, A. ^{[1
]}

Eroms, J. ^{[1
]}

Weiss, D. ^{[1
]}

机构：

[1] Univ Regensburg, Inst Expt & Angew Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.78.174424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied phase-coherent phenomena in mesoscopic permalloy (Ni81Fe19) samples by exploring low-temperature transport. Both differential conductance as a function of bias voltage and magnetoconductance of individual wires display conductance fluctuations. Analysis of these fluctuations yields a phase coherence length of similar to 250 nm at 25 mK as well as a 1/root T temperature dependence. To suppress conductance fluctuations by ensemble averaging, we investigated low-temperature transport in wire arrays and extended permalloy films. In these samples we have measured conductance corrections which stem from electron-electron interaction; but attempts to detect signatures of weak localization were without success.

引用

页数：6

共 35 条

[1] SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY [J].