Multivalued dependence of the magnetoresistance on the quantized conductance in nanosize magnetic contacts

被引：40

作者：

Tagirov, LR ^{[1
]}

Vodopyanov, BP

Efetov, KB

机构：

[1] Kazan VI Lenin State Univ, Kazan 420008, Russia

[2] RAS, Kazan Physicotech Inst, Kazan 420029, Russia

[3] Ruhr Univ Bochum, D-44780 Bochum, Germany

[4] LD Landau Theoret Phys Inst, Moscow 117940, Russia

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.65.214419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the quantized conductance of nanosize point contacts between two ferromagnets for different mutual orientations of the magnetic moments. It is found that the magnetoresistance (MR) is a multivalued function of the quantized conductance at the parallel alignment of the magnetizations sigma(F). This leads us to the conclusion that experimentally observed large fluctuations of MR versus sigma(F) are rather due to the conductance quantization than to measurement errors or a poor reproducibility of the results. Using the results of the calculations we are able to understand experimental data obtained by Garcia for MR of the magnetic nanocontacts.

引用

收藏

页码：2144191 / 2144197

页数：7

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